Jungle Teemo -- brings out the worst in people
I mostly play jungle. So because all champs are fun to play I started playing jungle teemo. Let me say, NOTHING brings out the hostility in team mates faster then picking teemo as a jungler. They go toxic in champ select and many dont stop during the game. Going 10/5/12 or similar does not stop the toxicity.
If RIOT is ever looking for toxic players, just watch a teemo jungle pick. It rarely fails to cause bad behavior