Have you ever felt the need to correct a stranger's actions..and have you acted on that?

So my sister and I were touring the Empire State Building and this guy was a real bubble buster (you know the kind who has no concept of personal space). As we’re on line to get to the elevators he gets closer and closer…and he has terrible body odor. So I finally turned around and said, “You need to spread out.” I wasn’t rude, just matter-of-fact. Ever have a similar experience?