This player needs to be banned.

I'm not naming names, I just finished a game with some slight banter, and the mid laner tells me that I'm the type of person to shoot up their school. This in my opinion is completely unacceptable. The sheer lack of respect for the lives lost in such a tragic manner is disgusting, and its left an awful taste in my mouth. I reported the player and plan on making a support ticket to riot, but no matter what the banter is like, never let it escalate to this.