Rep is that little check/x box thats right under your avatar. Bascially you can give someone props for something or send them a little e hate.

Its really just another way to suck each other off on the web, and some people here took it way too far back in the day.

And as for people sending you hate shit, it's the internet. It's the culmination of too many nights of sitting alone in your moms basement, jerking off to anime porn of ff characters and eating cheetos. Anyone can be an internet tough guy and talk some smack.

I really wouldn't let it bother you, especially over a videogame franchise. There are so many other things out there that are more important.