In my experience the proposed Genealogy Q&A site like this should take care when closing questions as "Off Topic" especially when "brickwall" questions are asked.
People who take time to ask a question need to go away satisfied that they have been helped and the question they are asking is always "on topic" from their perspective (mainly because they feel they have exhausted all their option and the ASK Genealogy SE site is the place to come to get help.
Other SE sites that adopt this policy are left with 1,000s of users with 10 or less rep who never return (this will happen here Im sure to some degree).
A general question regarding a brick wall can be asked "What are my options if I hit a brick wall? or "How do I research a person if I only have their death date?. Subsequent questions like "How do I find grandpa Joe Does birth records, he died in PA 1895" should be tagged as a duplicate of above, with a comment "if this doesnt help, please ask another question etc...". Then you will get I have tried the suggestion in [Question link] and Im still having problems, what next?
When people ask questions on other QA sites they often identify themselves as a "Newbie" to the subject. the answer to a brickwall question for a newbie sometimes needs to be different based on their degree of experience.
Duncans answer to this question also poses topics that should be questions here in their own right.
This is my first post here and I think a site like this is much needed. Nice Job and I hope it kicks off.