Unfortunately, those losers aren't rare to see. My way of dealing with them is completely ignoring them.
Of course, I reported this cute charming dude to CS and guess what... he was briefly banned for a week or so and came right back in. LOL Since then, I don't even bother wasting my time to write to CS any more.
I have screenshots, videos and audios of players (some even with high reputation here which I find totally hilarious) who slander, bash, spread false rumours, do and/or say all kind of nasty stuff to/about other players. You will be freakin' amazed how many wicked idiots and haters play this game!