I can speak to any story on AGW, where every pseudo-skeptic poster shows up en masse to attack climatologists, so yes, the Libertarians and Conservatives here are a significant fraction of the posters.
I'm pretty sure half the problems are:
* so many of the people on slashdot are STEM educated, and realize correlation is not causation, which damages the narrative
* the people speaking in favor of GW tend not to be accredited climatologists with PhDs
* the people speaking in favor of GW portray it as having solely AGW origins, rather than humans as a contributing factor
* presuming (as I do) that GW is real, but not solely attributable to AGW, no one is willing to give a percentage breakdown on cause
It doesn't help that there is a strong following of conspiracy theories on slashdot, and the disclosure of the emails talking about investigators specifically squelching debate reeks of conspiracy.
It doesn't help that the GW == (AGW & GW) proponents tend to be rabidly antinuclear, and can't solve some of the basic technical problems -- most of which, BTW, could be resolved by placing the panels in orbit, rather than on rooftops.
It doesn't help that a lot of us think "So what? We'll just science the shit out of it".
You don't really have to be a libertarian or a conservative or a "pseudo-skeptic" (whatever the hell that is) to jump down the throat of an AGW proponent who's not an accredited climatologist. In fact, in this forum, it's kind of considered your civic duty, like serving on a jury, or going out to vote.