Which is hard, when you're looking for an answer: something you don't know. How do you tell what's "quality" and what's not? LinkedIn is actually better off t

Which is hard, when you're looking for an answer: something you don't know. How do you tell what's "quality" and what's not? LinkedIn is actually better off than most sites, because it already has a "people you actually know" filter built in. If you've connect to randoms, you'll get random content. But if you connect only to people you know, you have a decent filter. And if people you know start posting rubbish, block them. Any pseudoymous sites are in a worse position, because you can't tell a person from a bot.