How about "Unsportsmanlike Conduct" as a report category?

Sportsmanship is not based on the mode, it is based on behavior. Behavior is what someone does.

So reporting categories should include unsportsmanlike behavior and allow the description to carry the information. Sure, there are things that fit the norm of being a jerk (offensive language, giving up, afk, etc.) but there is also trolling, not following convention (i.e., calling lanes and at letting other members of your own team have fun too).

Really. It needs to be something that is highlighted because so many people never learned it when they were 2 and their parents didn't teach them to share or "play nice" with their friends.

We can't take people out like that and shoot them ... but they are sociopaths and really truly need help to understand what they are doing is just plain wrong.