My gym is right next door to a karate school. I hate it when the idiots from that school come in to work out and then start sparring in the gym. The attendants think it's cool and that these guys are badass so they don't do anything about it.
The worst part is that these guys think they know how to fight, but whatever training they're getting seems like it's more about teaching them how to dance with weapons. I've been very tempted to invite them to my dojo for a friendly sparring match