I always try to look at both sides of the argument. I like to think of myself as a good hunter, but I've seen countless morons playing the class. IMHO, moreso than any other class- although every class has its assclowns.
It's already pretty much been covered, but Hunters have gotten a bad rep due to a few factors. It's easier to play a hunter than many other classes. Note that I'm not necessarily saying it's easier to play hunter well. Between rogue and hunter, they seem to have the best solo survivability of all the classes- hence, they're the most popular. A lot of people roll hunters, whether because it's similar to another game's class that they liked before, or they want to solo more, or they're not good on social interaction, or they can't handle the other classes.
Unfortunately, it also means that they can solo from level one to level sixty, and often will solo. As a result, if you get someone who doesn't group much (if at all) playing all the way to 60 before joining groups, they throw off the balance. They haven't already gotten past that learning curve of WC / VC / RFC / Stockades, where they learn their roles in a group. If it's a player with a social disability, often they don't like interacting with other people and refuse to listen to advice. I've seen countless situations where players (Hunters and otherwise) get advised to do something, or as importantly not to do something, and ignore the request because "it's their character" (although, to be fair I've also seen people who have run through instances a dozen (or more) times get impatient & downright nasty when someone makes a mistake).
Bad players can be found in every class, but hunters seem to be more prominent, simply because hunters have the safety line of a pet. Nine times out of ten, any other class will die if they get too much aggro, or take on a mob too powerful for them. A hunter can set a pet out and run away, or mend the pet while fighing, or even (after 40) feign death and lose the aggro that he had. Hunters are a good, solid, but ultimately easy class.
In essence, you get some hunters that play well. You also get some hunters that don't play well, but get away with it because they don't have to be accountable to anyone else when they solo. You find some hunters will roll on anything because people are selfish. It always seems like a hunter because, again, that player found hunters easy to level, and he lacks the social level to think of other players before himself.
I can cite incidents I've seen in almost every instance I've ever been in where a hunter did something poorly: jumped off of a ledge in Deadmines- then watched his pet take the ramp down, bringing several mobs behind, or forgot to put their pet on passive in Stockades, or pulled a mob using Aimed Shot- with the shot firing just in time for a patrol to reach the target. Then there was a hunter who decided that Multi-shot gave better damage, and oops- he pulled several mobs from two different groups. Let's not forget the Melee Master. This is the guy who decides that his melee skill will out-DPS his ranged attacks, and melees every chance he gets. I've seen several- one of whom called me a noob for not meleeing! I have stories about almost every class, but none as many as hunters.
Edited, Sep 29th 2006 at 8:03am PDT by Wondroustremor