I think one should have to have a minimum of, say, two months here before you can see the content of Requests, and three months before you can post in it. That makes it enough of a perk to encourage posting in the other forums and makes Requests available once you've shown you haven't come along just to be an idiot.
I was going to suggest a minimum post count but anybody can reach a post count by writing unsubstantiated drivel multiple times over - they can't travel through time.
Of course being a member of Club 2001, I could just be really awkward and suggest a minimum membership period of, I dunno, 18 years or something before you can see Requests
If you're not responsible after 18 years you never will be
No, three months seems fair to me.