1) When you're in a KOTH lobby, join a party, even if you're the only one in it. This prevents you from having to listen to the cretins being cretins.
2) If you don't follow #1, and somebody complains about "spam", you need to complain about shitty players who lose to a guy who does the same thing over and over.
3) I once had some online player tell me explicitly that Raiden, Noob, Mileena, Reptile et cetera are bullshit characters because they "rely on special moves." That's a really clear indication of what you're dealing with online; people playing fighting games who have no idea how they are played.
Just do whatever nets a win. I hate a scrub as much, probably more so than the next guy, but all these threads bitching about scrubs bitching about whatever they bitch about are getting almost as annoying as the scrubs themselves.
Oh, and most importantly, if any MK9 player tells you "MY CHARACTER IS HARDER", laugh at them. Laugh very long, laugh very hard. Every single character in this game is designed so any retard can grab the controller and play. No exceptions.