Just playing some quick match. Go to defend keep from a siege merc soloing it. Get yelled at by a scrub hammer (really bad, looked like it was his first time as hammer) because I wasn't there for their random teamfight. Suddenly I am a terrible player etc. etc., despite the fact that they engaged in a teamfight down a player who was at the opposite side of the map with no global travel. I reported him, I got zero qualms about doing that. And it's not a big deal but it turns me off from playing another game sometimes.
This bickering is insidious. I like to think blizzard silences each and every one of these people. It's not worth raging at someone in this game. I'm never going to see you again. You're literally irrelevant to my life. Why lose your chat capabilities for such a dumb reason.