But what about only members with some activity can start new thread?
The minute you start to regulate things it opens up the door. The only regulation so far here has been centered around keeping the discussion going and keeping the spam to a minimum.
You really have to credit Thermos and the team here for keeping out of things and acting in such a wise fashion most of the time.
Although I don't agree with every decision they have made, overall I can't see how you can't give them an A+ for running a forum that in many ways is in the center of the decentralization movement.