Precisely, pg has put some interesting controls on the site based on lessons learned at other places. For example, new users can only post so fast, and can't do

Precisely, pg has put some interesting controls on the site based on lessons learned at other places. For example, new users can only post so fast, and can't downvote until they hit some karma threshold. The idea being that new users are forced to observe the community conventions on the site and decide if they want to conform to them. By the time they "grow up" they can then move about with greater and greater freedom. This seems to work pretty well regarding arguments and comments. However, as this topic most clearly demonstrates, the pain point on the site is not the nature of the comments or forms of argument, it's the up/downvote problem. The theory was that higher quality posts would naturally end up with higher scores from more upvotes. Lessons learned from this site should show that to not be entirely true.