I'm actually thinking how to prevent this case scenarios. I started to make people sign additional paper with the house rules upon the arrival .
It helps, I must say. Also 50% of guests get offended because I don't trust them.
But business is business. I noticed when people sign additional papers in real life, they are much more responsible. Basically, they sign the same info on the paper which is listed in my ad. But, as we know, nobody reads the ad. The only problem is that it's additional expenses for printing out 4 pages plus a paper clip.