I report for easy if it's my team winning or losing. Simply because it doesn't hurt to have a bit of humility and it's just being a douche when you may have won/lost because one guy on the other team had a bad game/first time in a role or champ.
Show a bit of class when you win. I just won my last game as a 15/1 lucian we absolutely crushed bot leona was lvl 6 at 20 mins and every other lane was beaten. I didn't even gloat said GG wp and lef it at that.