@Matt26 thanks for this info because I just had an unpleasant experience last week and would like to give the next host a heads up.
Unannounced and a non paying extra person showed up after the confirmed guest checked in (she could have been underage, I don’t know), empty alcohol bottles and a pile of condoms were left behind two hours later. Clearly a one night stand. Of course they were upset, but thank God they left (after I called the police). Not what I expect from an Airbnb guest. They checked in Saturday night at 10 pm and left at midnight after I addressed that the second non paying person has to leave. Two young kids just needed a room for sex. I am not sharing my home for that purpose. Based on this experience, I am not taking in locals in ever again. I thought he was from Montreal, as he explained. Turns out he’s from Toronto. Hosts have to be so careful when screening people. Airbnb did not give me a chance to write a review on this person yet. How does this work?