Stack Overflow is the bitcoin of programming Q&A. Like it or not, theThe keyspace (bad questions) is growing faster than the mining rigs, so there isn't enough power to search the keyspace, yet without the keyspace, there is no point in searching. The problem is, humanHuman miners cant keep up, no more than Google can manually moderate all its content.
On second thought, Stack Overflow is like bitcoin mining, where other miners can fire torpedoes at your mining rigyou.