.....Also, I don't like it when people ignore balance. Like when some high roller plays a little kid, smashes his basic troops (which is all he owns) with the best units money can buy. Then thinks he's the hottest tactician in history.
Then again, that's partially the games error. But bad sportsmanship grinds my gears.
The problem with that situation is, and I have witnessed examples myself, is that it teaches the kids that that behaviour is not only acceptable, but expected. He has planted the seed of the next jerk.
Back when I started out in 40k, owning only a handful of orks from the box set, a big mek with SAG, some lootas and nothing else, I remember playing a guy who regularly turned up to play me using his TWC, flyers and landraiders.
He regularly used these troops, unbound to hammer everyone, and I watched as the youngsters started to emulate his behaviour. He really was TFG claiming to educate people, but forgetting rules when it suited him, or rules lawyering and making the environment an unpleasant one to play in.
I eventually joined a local adult gaming club, which he was a member of and his shenanigans were not tolerated there. I also picked up and started playing x-wing which seems a lot calmer and more balanced.