We just returned from an RCL cruise and one evening at the buffet (RCL buffet is another rant for another time) the guy next to me drops the tongs ON THE FLOOR! Now at this buffet line people were acting like they had not seen food in days, shoving and pushing their way in. So this guy drops the tongs on the floor, then bends down picks them up and tries to put them back in the food! I actually said something to him (a bit loudly) about how they were just on the floor. The man behind the counter was quick to take the tongs and replace them with clean ones.
I guess that pax had a three second rule about food or utensils on the floor... It was gross!