The real danger is that the site is used buy a lot of young people who will consistently walk away with a completely skewed and incorrect notion of the subject they are asking about.
As they say: "Be the change you want to see around you".
Much more effective would be to advance the cause of workable communities or products while starving out the page views of ones beyond repair.
And Gandhi never added qualifiers to his statement. As a matter of fact, the more broken a system is, the more it needs good people to step up and affect change.
Suffice it to say I now avoid Yahoo answers as well.
http://answers.yahoo.com/question/index;_ylt=Aj_AlHhmSE3TfJp...
Best answer, chosen by voters begins with: "I dont know the answer to your question."
The rest are a bunch of random guesses by people who don't really know anything about the topic. That's actually exactly the sort of thread I am disappointed to find when I ask a question like that. I could just ask the nearest person or call my mother and get more or less the same results. Honestly, if I spent 30 seconds brainstorming I would probably come up with at least half of that list of answers. I'd turn to the web for slightly more detail and authority, which isn't in evidence there at all.
That being said, I have been surprised at the number of times I've found relevant answers. It's more often than I expect, even if it's not as often as I'd like, and I do find the quality of Yahoo Answers to be less consistent than Stack Exchange,
Teenage chat? Seriously?