There's a guy who races the Tuesday Night Worlds around here. Not my nemesis, but it's fun to watch him race in the P/1/2 group. He's had his ups and downs, been fighting some demons but theory is he's cleaned up and is making a go at getting back into the pro ranks. He's won the last few Tuesday nighters except this week's, when he misjudged someone else's jump, got hemmed in and ended up third.

It's been very entertaining to watch him as he gets stronger and messes with the locals. Pretty sure some of the stuff the OP mentioned is going on in the group, except this guy doesn't seem squirrely.