I coach youth soccer, so yeah, I've had a couple of confrontations. Usually I can stop them pretty quickly. It helps that I'm a 6'1" 220 lb male. The worst (or stupidest) one I had was a parent trying to sit on the kids side because there was no shade on the parents side. I told him he needed to move and he refused. I explained to him that only coaches and players are allowed on this side for player safety. He told me he was a coach, so I asked to see his coach's card. Which of course he didn't have. I told him he needed to move or the game would be forfeit and I would call the police because he did not have the proper background checks to be near the players. He moved, but moved behind the goal. So he technically wasn't on the players side. You know like something a 10 year old would do, not a grown ass person.