Reporting people. Does it help you?
No.
Reporting people does nothing for you personally. The fact is, if you are becoming upset by others, then you need to work on not getting upset, because that effects your play style and performance more than reports.
If you work on improving your gameplay by warding well, encouraging players on your team to work together, and being nice to people no matter what they do, you will win more games.
Some games you will lose of course, because there are always going to be feeders, and angry people who have bad games, and trolls are in there too.
You don't have to lose as many games though, so don't forget to start fresh after every game, win or lose. Your new team doesn't know if you recently lost or had a troll in your last game, so don't punish them for something they have nothing to do with.
Just focus on getting ahead in your lane, vision, and setting up early ganks. Whatever it takes to make your team win and the other team get frustrated first to take home the win.
This topic seems relevant given a recent abundance of perma ban and report posts. Riot won't fix anything, it is up to you Summoner!
[garen-swing]