you know, there's a flip side to this discussion--
e.g., "has a gunny ever visited an anti board?"
Some of us have done so--and been promptly thrown out, even with polite, but challenging discourse. Prototypical examples include The HuffingtonPost, or Democratic Underground.
Consider the 'comments' sections of notoriously liberal newspapers--where the comments are 'moderated'--i.e., controlled access run by (at best) editors with a bias. The LA Times editorial board is a primer example of this one. The Washington Post isn't far behind. NPR comes up next, I guess.
Then there are the various 'conflict-discussion' board--OpposingViews.Org is one I frequent. Most of these boards are well-covered now by pro-gun posters; if anything, the antigun sentiment there is naive and hopolophobic.
My impression is that we go farther here, at THR, in providing a well-moderated forum that allows for polite, well-written disagreement. If a poster has more than a typical orifice to post but is not running an antigun argument, and is well-reasoned in it, it will be tolerated--if beat upon. Antigun sentiment is at worst ridiculed, and at best, deconstructed well to expose its flaws. The discussion really remains between people of similar bent if not similar opinion, AFAICT.
Jim H.