Yes this is my main, and yes he is my alt, and so is the one you played with earlier :P Now shush or you're gonna blurt all my secrets for the world to see ;)
If you play good people will +K you (don't expect every good thing you do to be counted, cause most are lazy fucks) and if you fuck up they will neg-bomb you to show you their wrath (ignore it completely). You'll have Karma capabilities once you reach 2000 points. People will be able to karma you once you have played 20 games :)