StackOverflow is simply a tool that I do not need.

It is not a community site, it is a Q&A site. Too formal. I find it far better to ask a question on a specific mailing list and not on SO. It causes fragmentation and I prefer to have one canonical source of information. Rails question? Ask the mailing list. A community site for developers would be welcome.

Another big problem that I have with SO is moderation. I do not want anyone editing what I have wrote. It would be fine with the occasional editing of egregious errors, but SO moderation is out of control (IMHO).