No.

Hasn't experience over the past 10+ years answered this question been already?

1. Audience shrinkage — less readers and posters would mean less garbage, but it would also denote less of everything, including quality…

2. Less of an attraction even to one subscribed with the subtraction of public visibility (outside search engine scope).

3. Already a tried and failed proposition — look at NY Times, WSJ, etc.…

The genie is out of the bottle and their really is no way to stuff it back in and cap it again…