Nah, P&N has had a pretty recent (over the last year or two) upswing of right-wing trolls and crazies. If this was ~2006 I'd agree with you, though.
I'd describe myself as strongly right-wing myself fwiw.
Is this even up for debate? I mean, plenty of "how do you identify yourself politically?" polls over the last months and years, have pretty clearly shown the forum really without question is left leaning.
Now, as far as
trolls go, that's more involved a question. There are obvious ones on both sides, some just post more frequently, and therefore get more exposure. Hence, seem to the casual observer that they are more numerically represented.
It's tough to discuss without literally calling out names, but if we were able, I don't think there would be a question.
What's less obvious, and more in keeping with the OP's question, is just vitriolic, hostile, abrasive personalities. You know the ones. They can't post a response to anyone without a DIRECT ad hominem attack, personal insult, and profanity. That can go both ways, but seeing as how there are simply more left-leaning active members, it's not surprising that a good many of that type are leftwing.
If conservative members outweighed more liberal ones, I'd fully expect more of that type on the right on this board. It's just demographics. Dicks are dicks no matter what political affiliation.