I always throw my stuff on what ever equipment I'm using so that people will know its taken. I was benching the one day, walked over to grab something, came back and found some jerk stripping the bar, and taking my water bottle, towel and shirt off the bench.
Another time on the same bench, I was doing close grip bench with 295lbs for sets of 5. I went over to do a set for biceps. Well the guy using the hammer strength next to the bench, decided that was a good opportunity to strip 35lbs off one side of the bar to use on his machine. I came back to do my set, he sat there from 5 feet away and watched as I lay down and unracked the bar to do my set. Since now the bar was competely uneven The weights almost went flying off the other side. The ass just sat there watching me