Guests who disrespect housekeeping

We had a case recently where a guest literally kicked over a "Wet Floor - Do Not Enter" sign just minutes after our housekeeper had washed and waxed our floor and we had advised guests the kitchen would be off limits for about an hour. About a year ago also had a guest who, in the middle of our housekeeper cleaning the bathroom, walked in, dropped trou, and took a dump right in front of her (that guy I think had something wrong with him).

Has anyone else seen a rise in this type of guest behavior when housekeepers are present?