A famous pro wrestler FLIPPED OFF off a 7-year-old kid at a meet and greet in Chicago this weekend -- devastating the kid -- but it begs the question ... should the dad have known better?
Here's the deal ... Tom Gilmartin brought his son to meet AEW star MJF (AKA Maxwell Jacob Friedman) at the Chicago Comic and Entertainment Expo.
MJF is famous for being a heel (that's wrestling speak for "bad guy") and part of his gimmick is being a jerk to kids. It's no secret. Everyone knows.
So, when Tom and his son came face to face with MJF, the wrestler busted out the single barrel salute right in the little guy's face .