Sad to say, but I can use a pro wrestling analogy for this (I know, I know, please bear with me).
In the WWE, and other wrestling organizations, it's a longstanding (maybe 40 or 50 years) tradition that when a new wrestler comes into the locker room, they have to shake hands with every single other wrestler and introduce themselves.
It's supposed to symbolize, from back in their secretive era, that the new guy was actually a member of the fraternity and kinda knew their code. A wrestler who didn't do the hand-shaking thing would be seen as an outsider at best, or a stuck-up asshole at worst, and usually wouldn't last too long. EVen if they shook hands with 49 guys, if they forgot to shake hands with No. 50, that guy would be pissed off at him and the other wrestlers would be whispering about why the new guy disrespected the veteran.
What you've done is the equivalant of coming in here, and not shaking anyone's hand (figuratively, I'm meaning here), and you've generated a lot of heat. You have to earn everyone else's respect before you pop off. Like others have said, don't post every little thought that comes into your head. Coming in as you have, you've left a bad first impression. And you know what people say about first impressions.
That doesn't mean that, once established, you won't **** people off with your posts. Maybe they just disagree with you, or maybe they're having a bad day. Or maybe what you posted ends up really stupid and on that occasion, you deserve to get ripped on. They'll be times that you'll post something that you'll regret. Heck, I have 9K-plus posts and there's some ones that I'd be shaking my head about today.
So the advice I'd give you is to think before you post, show respect to the others here, and don't try so damn hard to get a reaction.