People gossiping or ranting about irrelevant stuff, especially when it's stopping them from fighting a pull. I'm really uninterested, pls go make a blog.
LS/FC cliques getting overdefensive or snappy at anyone outside their own crew, usually over dumb minutia. And they usually underperform. These I don't take the penalty for and will just keep goading for a kick.
People that don't leave when it's glaringly obvious they can't perform with their connection.
When I have something wrong with my connection.
When my fish catches fire.