@Dionne1 Communicate with your guests at the time of booking. Not just saved messages reinterating your house rules, but actually a message or two asking them a bit about their plans, asking them if they have any questions about you or your listing, etc. Not an inquisition, but a friendly communication. If you can insert a bit of humor, that's good too- I find I can tell a lot about future guests by their responses. Did they "get" the humor or are they tight-asses? Do they actually answer your questions or do they reply with something else? Did it take them 2 weeks to reply, or did they not reply at all? Do they answer in 1 line "tweet" style, or are they more communicative? Are they casual, or more formal? These are all ways I find that I get a feel for guests before they arrive, so I'm a bit more prepared for their particular personalities.
Luckily, I've not yet had a "bad" guest, nor have I had to decline requests, but this is also in part due to the particular type of listing I have and the type of guest it attracts.