I was thinking recently about how often this site gets questions related to android development that are instantly closed (because they are off-topic). And I thought of how the meta sites require a specific tag before you can post a question.
My idea is to have a tag, such as 'development'. When a user adds that tag and tries to submit the question, it returns an error and explains that development questions are out of scope for this particular SE site.
Is this doable? Is this a good idea? Just thought I'd throw this out there.