Disrespect at a car show.
Respect, common sense, courtesy are all a lost art these days. It truly is a shame. It's not just a car shows, it's everywhere.
I am actually surprised when a young person says excuse me, or asks if they can do something BEFORE they do it.
Example: I was standing looking at something in the store and a young couple, teenagers, walked between me and what I was looking at and the guy said "excuse us" I stood there dumfounded.