What are the consequences if you get reported?

There's this person who I have been queued with 5 times today whose routine is to afk, whenever the enemy team is 30-50 points ahead. I'd understand if it's 200 points or higher, but no, I think that is his threshold for being a sore loser. What does he expect, win all the time?

Does anyone have any experience when it comes to reporting somebody, or being reported and having consequences - or is this just a gimmick of faith for players to feel that someday abusive players like this guy will face god's wrath?