I think of all the drama that happened in my 90's era group I gotta say the funniest ejection was the creeper dude who'd been hitting on the dm's girlfriend. He had a wild mage and so one day he rolls a wild surge and ends up with a giant head and the appearance of being undead. Our undead slaying barbarian freaked out and beat his character to a pulp.

The most surprising twist came when after eight years of playing with that group the DM-who at the time I considered my best friend-took out his frustrations with his teaching job and my difficulty paying attention in game (I have ADD) by having an evil jester polymorph into a giant gorilla and rape my character. I left the group after that. I'd met someone and was already frustrated with his not being supportive of my moving away (most of the people in his old group had moved away and he resented them for it and me for doing the same).

Fortunately the group I've been in the last year and three quarters has been pretty low drama. It's my best friend of three years and his best friend of 22 years.