What Oxrock said.
Those calling for moderation seem to forget that this sort of thing drove people away from another board. Start moderating here and there will be no more PPP, mostly because the moderators (like the rest of us) have strong opinions about some of the things discussed here and, while I respect the authority they have, I don't think moderators can be unbiased over here. Darin, I think, has done a fine job on this board. He has applied bans when someone becomes so insufferable that it transcends their political opinions (see: Dellapelle John and Duh Big Man).
This place is buried as it is, nobody has an obligation to come back if their wittle feelings get hurt. If you feel like someone's post didn't attack the substance of your argument, ignore it and engage with the posters who did address your actual argument. We've all been insulted on here at one point, and we get over it because we realize that the vitirol comes from disagreement, and it's usually nothing personal. Let this place be.