There are two functions stack overflow serves:

1. Answering questions people ask, q&a

2. Answering the questions of people stopping by looking for answers.

The output of the former needn't directly be the input consumed by the latter. Bad questions can be tolerated in the former but are intolerable in the latter (noise).

Solution: A curated site of answers searchable by public drawn from the best of q and a from an internal site not indexable by google, etc.