I'd like to see them doing scoreboard videos on etiquette. If everyone gets to see these then no one has to feel like the @sshole that doesn't know baseball etiquette.
Personally, I don't get upset at the well prepared person that wants to rush by between at bats, or when someone visits the mound, or after a fly ball, or whatever. But you get the occasional moron who waits until he's got you standing up, is now standing in front of you and hasn't settled with the wife and kids exactly what he's going to get. The only time during the game he hasn't been texting with someone, he's standing in front of me shouting across five seats to his wife.
It took several years to quash the "O". This will take time, too.