I have taken the liberty of breaking down your post to show where things went horribly wrong;
1. "I was reading the official forums."
Unless you're using the dev tracker, this is generally a Very Bad Idea. It's basically on the same level as hitting yourself in the testicles with a mallet in that it not only hurts you, but future generations of offspring will be affected as well.
Hawkian did the math a while ago and though I can't find the link, the developers have commented how most of the negativity is tied to ~100 accounts just constantly posting negative shit. Since the game is B2P, you don't actually have to pay a sub or anything to post at the forums, so people who bought the game once can bitch about it indefinitely.
2. "Trying to get tips."
The Official Forums aren't there to help each other out; they're there so people can bitch about things and call developers stupid, dabbling in arm chair game design and occasionally flirting with a useful suggestion (lost in a sea of negativity). Maybe once in a while someone threatens someone's family (videogames are serious business, after all) and gets banned.
The Necro players on GAF are already rushing to your aid, see posts above.
3. "Necros are the worst class."
To the people on the official forums, anything that ever happens or exists is at some point 'the worst possible thing ever'. Graphical glitches are disasters, connection issues are cataclysms and class balance issues are on level with genocide.
4. "They managed to convince me."
In the same way zombies convince people to also be zombies; by inflicting huge amounts of brain damage.
Friends don't let friends visit the official forums, not just for GW2 but for
any game. All you get is the opinion of a very small percentage of players with an axe to grind. Even GW2 Guru's forums would be better, and that's really saying something.