One couple staying the weekend the guy kept going on about how much I spent on food and how much I wasted money, how ridiculous it was, and that I should have served left overs for dinner from the night before instead of cooking another meal for our guests,,,, whilst shovelling down his dinner.
When they left they had not only not made the bed, the quilt was hanging off the bed in th floor, the used towels were also thrown across the bed room floor, there was used crunchy tissues in the bed, and the bedroom furniture had been shifted out of place.
Our other friends visiting at the time said they felt he was doing it to prove a point, he felt we were "rich" and he wished to show his disdain for the fact we were financially better off than him (not rich) by treating our home as he would a hotel and ensuring I had to clear up his mess.
Needless to say we've not had them back.