man ive seen them but they get better everytime.... my little brother n his friends have been thrown out of a few stores for stuff like that... the first time him n a guy dressed up as cops and sent a friend in bout 5 min previous.. then they walked in, found him n chased him all over the store until they got kicked out... the second time they all grabbed a trolley and went around the store filling it with stuff, then swapped trolleys n had a competition to see who could return everything first.. funny stuff