This is an issue I have dealt with over the past couple years also. Because of our location 75% of our guests are tourists. I agree what was said people’s outlook is an entitled view. On the whole, gone are the days of being respectful and friendly to everyone. For myself unless there are other issues, like not completing check-out or things left in a disarray I tend to not make a big deal out of it. I figure if they want to be mysterious about themselves that’s their privilege but it is a check in my mind against them if any other type of issues should arise. On my reservations that have been negative I’ve all ready wrote in my private message/review to them that is this not a hotel but our private home and they may be a better fit for a hotel room if following house rules and instructions isn’t their thing.
The one not great review I got here, maybe 2 years ago, Airbnb buried it towards the bottom of reviews, so it was not the first one you saw. Now, if that still happens, I don’t know.
I’ve never had that but I have recently had someone who requested early check in at 12 noon. I was in a rare situation, and mood, of being able to grant it. They booked for one but showed up at 1:30pm with a companion and no luggage, just something that looked like one large shopping bag and a purse.
At this point what are YOU thinking. I bet it’s not good.
At 3:30 pm they both left, carrying out the same bags they carried in. I wasn’t sure they were checked out but didn’t want to ask. After all, the guy had paid for another 18.5 hours. No messages after the first one asking for early check in.
Tell me what you’re expecting and I’ll tell you the rest of the story. (hint: it’s boring)
Also I’m curious about how you know they “checked out” if they didn’t say they had. Are you saying they left and didn’t return the second day and you realized at the end of the stay they had “checked out?” Did a camera show them leaving with all their luggage on the second day?
Edit to add: a review from this guest just came in after I made this post.
Sex worker?
Someone who wanted to shower during a long layover and didn’t want to do it in the airport?
Local TV presenter who needed a place to do her hair before presenting? (I’ve had that – a presenter on a home shopping network TV channel who stays with me when she’s filming in Sydney and she barely spends any time in the apartment but when she does it’s either to sleep or do her hair!).
We’re all dying of curiosity, please tell! And tell us what the guest review said!
My guess would have been an affair, but I doubt that’s it, as KKC says it really mundane.
I’d find that really irritating!!
If they don’t want to communicate…just leave them alone…
LOL. I’m sort of waiting for Balivilla… it’s interesting to me that they are expecting a bad review. I was hoping for more information but may not get it.
I think most hosts here would not grant the early check in and wouldn’t get the booking but if they did they would be making negative assumptions once the guests arrived. I don’t care what the couple does as long as there is nothing exceptional about it at turn over. It was in nearly perfect condition when I went in. Only the multiple circles left on the table where they set the lube down hinted at a tryst.
The review only said “great place to stay” but he did check off detail compliments in every category. He was especially effusive about the Check In category. I guess so, considering he was here and gone before most people check in! 
After I read his review, I thanked him for it in our message thread, not in the public part of Airbnb. He truly is welcome to book again.
I posted about this elsewhere (then deleted I think) so I’m not sure this is a guess for you, but it would be for Balivilla. I don’t really know if “affair” is the right word and probably never will. I wasn’t shocked that he left a review because he reviewed his other local host.
Yeah, I wasn’t sure about using the word “affair”, either, as that indicates extra-marital hanky-panky to most people? I was trying to be delicate, but what I meant was a place to have sex for a couple of hours, regardless of whether they’re both single or not. 
I suspect that it isn’t unusual for Airbnbs to be used for that purpose.
I operate under the same assumption as KKC. I do not want to leave a lower rating for a person simply because they did not communicate. In my mind a guest is definitely five star if they didn’t communicate (uses up less of my time) as long as it doesn’t affect my star rating. If they failed to communciate an issue, and give me a bad rating, well, then they are no longer a five star guest. But these are the minority and I don’t want to punish the majority because of this minority.
I design my systems for the good guests (> 90% of guests). I don’t penalize the good guests because some weirdos did things that are not acceptable. I don’t make a long list of house rules or cleaning chores or add legalese type language to my listing, as that would deter the good guests.
I have ways to take care of the bad guests.
I like the word “tryst,” obviously.
CCTV outdoors with them taking all their luggage, that’s how I knew they left
My understanding is that 3 trips means they booked 3 trips but haven’t stayed anywhere yet.
Where did you get that idea? There would be very few guests who would be asking to book who had 3 other trips booked that they hadn’t stayed at yet.
I could mean they have booked and either didn’t review or get reviewed, or haven’t stayed yet. I know hosts have to have 3 reviews before their aggregate stars show. Maybe there’s something similar for guests?
I just had first time Airbnb guests who were travelling and I was there first stay ever. Their profile after they booked read one trip.
Well, which is it, folks? Because those 2 statements are completely contradictory.
That is good to know and I’m pleased that they have taken concrete steps, not just sent pablum messages about “everyone belongs.”
I’ll have to remember to pay attention the next time I get a request from a newbie with no reviews and no trips showing, to see if it changes right after their booking is confirmed, but before they have stayed.
If they allow you to have trips on the profile before completing them then that opens a big loophole for scammers.
Book one nights stays at instant book properties with refundable rates in the future. Then book the place you plan to trash. Stay at the place you wanted, trash it, and figure out a way to get a refund. Then cancel rest of the refundable trips.
I wouldn’t be surprised if Airbnb creates this loophole since they are a scammer magnet and love publicity whether it’s good or bad.
They are more interested in getting more bookings than protecting hosts or guests.
I also doubt that partiers and house trashers bother to concoct some elaborate scheme relying on some inside knowledge of all the guest info provided to hosts, or knowledge of how showing “trips”, with no reviews would lead a host to respond, to eventually get to book a house they “plan” to trash.