"OMG 1v1 ME NOOB"

I usually have no problem with trolls in LoL. And I've noticed that the tribunal has really been doing their job keeping the level of douchebag-ness down. But lately, it seems like it's skyrocketed. The situation that brought me to this rant is this:

So, I have a smurf account because my brother recently joined LoL and I made the account to help and level up with him. I've encountered many many many smurf accounts who think they're gods for picking on new players. And i just got out of one game where the enemies were a 3-man-premade. They were smurfs as well, but they weren't even good, at all. Especially compared to the big game they talked. Right away, they kicked off the game with "get ready for surrender, noobs" and as they continued to get slaughtered, they just kept going and going with constant insults. All arguments ending with "all u noobs anyway" "none can 1v1 me all baddies" "omg little bitches dunno how to fight fair" "faggots bitch ass 1v1". After a quick 25 minutes destroyed nexus, they went right into post-game chat, and acted like jackasses again. They then finished it off with "w.e troll game anyway gg fags".

I just don't know how people have fun doing this. It makes no sense to me to act like a complete douchebag and ruin someones 20-40+ minutes.

TL;DR - Trolls are assholes. Why do people have fun trolling? How do i deal with them besides report and /ignore?