Experts-exchange is indeed an annoying site, but I'm not sure I'd classify it as a content farm. There is actually a lot of information there not found on other sites.
Then don't add it to your block list... That's the point of customizable block lists. I agree there's a lot of content there not found on other sites, but there's also a lot of content on eHow not found on other sites. The content's junk though, which is the point and is why I blocked both.
I didn't mean to sound ungrateful. I appreciate the list.
I just meant to inform that, by definition, I don't believe e-e is a true content farm. For anyone adding these sites blindly, you may miss out on that obscure answer you've been looking for.
[edit] I don't know how I find myself in the position of defending e-e, but there are lots of SQL Server related answers on e-e that haven't yet been duplicated on Server Fault or other more friendly sites.
No worries. That's why I updated the sub-heading to "and general spammy user generated content sites" because sites like EE aren't classical content farms (they're even smarter by getting people to give them content for free and then selling it to members!).