I always, always, have I mentioned always engage the dead bolt. Too many maids have tried to walk in on me!
Most unpleasant discovery was an un-emptied trash bin (which seems mild after reading this thread from start to finish!).
Lately I've had a rash of maids leaving their grubby grey-ish cleaning rag in the bathroom, either on the floor or next to the sink. Once in a Marriott, once in a Hilton. In the Hilton, it was accompanied by a printed list of guests names and room numbers, which was stuck between two hand towels and fell onto the floor when I reached for one of the towels.
- Truly