Man, the Life Advice forum fails.
Someone comes in with a genuine problem. Most of the time, the trolls get to the thread first. They post a trollish response along the lines of "that's not a problem; ignore it", "be less of a loser", or "pay someone to solve it".
And then there's the people who offer advice, but really bad ones. The type of intellectual posers who act as if they if they know the answer, but just made it up on the spot. And these same people sometimes get into hollow arguments defending a point that isn't true, but can't be proven false. Also, these people tend to derail the thread by ranting about stuff tangential to the main problem.
Then there are the people who actually offer advice that works. These people offer one-shot pieces of advice, but there's just so many other trolls and non-helpful people derailing the thread that they don't really get noticed. They probably make up like 35-65% of the people who respond, but they don't really write that much.
Also, sometimes all the trolling and the derailing pisses off the OP enough that he tends to get annoyed when someone gives a genuine answer. I don't think I've ever really seen it help someone (other than that time I asked about engagement rings)
EDIT: RANT 2.. after looking at the Atheists thread.
I hate how Internet arguments are about discrediting the other person. They don't argue whether a point is true or false.. they argue whether the other person is worth listening to. I especially hate it when someone points out a typo and uses it to point out that the other person has no intelligence because he can't spell. Or Godwin's Law.