This is addressing the issue where your guests logged out of your account and into their own. First, they didn’t log you out of your Roku, rather they logged you out of one of your accounts that is accessible through the Roku, such as Netflix, or Amazon.
We have a Roku in the guestroom. With regard to our Netflix account, we do not allow guests to log into their own accounts. Rather, we have a separate account set up just for guests. That way, they can watch what they want on Netflix and not mess with our account. We also have the Roku as locked down as possible, so that guests can’t be adding apps or channels as they wish. In order to make almost any changes like that, the PIN in required, which we under no circumstances would ever give out. Anyway, if you figure out how to lock down your Roku, you will have less worries about having to physically be at the rental to fix things like that.
We absolutely would never allow a guest to buy a movie under any of our accounts, and I’m amazed they ask. Geez.
As others have said though, a Smart TV is by far the best option. When we get enough money we will replace our current not so smart TV’s with smarter ones, LOL!