Hmm...
I don't like it either.
For instance... I made a site navigator in my sig, and how can new users use it(new users would be the ones who actually need it)? If they have 10 non-spam posts, then why would they need it, you know?
Just a scenario to show a con of the post requirement.
Anyway...
Lets get creative, Linux and FireFox didn't get where they are from talking about global settings... Think!