I agree that Brand New and Newbie accounts makes lot of crap threads with stupid questions. But I think that restricting to start threads for these users isn't perfect solution. Many people with new accounts came here to make their service announcements, how they would have to make announcement if such restrictions would be implemented? Farm account until reach Jr. Member rank? Buy account? Hire someone to post announcements and spend money for it? But maybe restricting to make threads only in Bitcoin Discussion board can be good solution.
Of course it's not perfect, but why let perfect get in the way of the good. I think it's at least worth trying. My guess is that there'll be a marked improvement in the quality of new threads. People shoot down suggestions just because they won't eliminate every conceivable problem, but that just hinders progress. Not sure if theymos even reads these threads, but he really needs to kick some ass and get this place cleaned up.