Holy crap, all these people sitting here talking about casuals/hardcores/raiders/scrubs... you "hardcore" folks act like having enough time to sit around and get geared up enough to do this heroic content somehow makes you better than the general populace.
No, I didn't finish heroic DS for those of you prattling on about that. I got 5/8 HC. But that doesn't mean I'm not a raider. I have a JOB. I have a LIFE. I'm good enough that even having only a couple hours a week to even devote to something like a video game doesn't mean that I can't keep up with the others who sit on this game all damn day running heroics and LFR for VP and gear.
I did raiding because I was good at it and it was a fun means to spend time with my friends. And I DEFINITELY don't think sitting on my butt that long is something to rub in other people's faces.
What's that? You should be able to say whatever you want to anyone in the world because you earned Realm First today? Oh, ok. I guess that means I can talk down to you too since I earned a paycheck today, and spent time with my family/friends.
What DOES make people different on this game is the attitude. You have those who aren't very good at their class and aren't willing to listen to advice and get better, those who are good but think it makes them better than everyone else, those who aren't good but are eager to learn, and those who are good AND are humble about it, sharing their tips and tactics/dungeon strategies/game knowledge with those who ask/need help instead of hogging it to themselves and calling everyone else "bads."
Quit it with the elitist crap, seriously. It's been old since vanilla. You're NOT better than anyone else because you downed heroic content when it was current. You're a person. I'm a person. We play the same game.
Play it nicely, ffs.