To me this is something that is not worth the risk for people you do not know VERY well.

The thing is that because of your situation if something goes poorly or you find you are uncomfortable later it is too late. Sure you can put it back to closed and change all the passwords but it is a socially awkward position and you are already exposed.

It is impossible to know if people are good or bad just by noticing what kind of car they drive etc. I mean honestly. I learn new things all the time about what my HUSBAND does online (nothing to worry about) and we have been married for working on twelve years).

You don't have insight into what they will do online or what people who visit them will do online. So you are taking a certain amount of risk. The reward seems small.