I think skeptics are people, too. What I've seen, more often than not, is someone with an unusual belief or thought come here, post their idea, and do so in such a way as to either a) present it as revealed truth, or b) present it so as to undermine what they see as 'faith' in the established truth. Then a couple of folks come by who take a number of different approaches: 1) asking for evidence; 2) discussing reasons why the person's belief is invalid or suspect; and 3) scoffing and belittling the original poster.
It goes differently, of course, for every poster in each situation. Claus, for example, usually does a pretty good job with his requests for 'evidence', but he also becomes obsessive and badgers his subjects needlessly. He's also been guilty of moving goalposts and out-right denying evidence from time to time - Married Catholic priests and the Sedevacantist Catholic Church comes to mind...

. His approach works sometimes, and sometimes it back-fires.
Rolfe, on the other hand, is rarely anything but level-headed. She simply knows her material, and uses that knowledge to deal with those who would peddle woo as medicine. She's hardly ever a scoffer, but from time to time, the battle seems to get personal for her (only because she cares), and some woo's feelings or pride gets injured. Frankly, I think that's fine - if you're going to try to sell willful ignorance, you deserve to get hurt emotionally.
Unfortunately, I'd wager that 80-90% of the non-skeptic population who drops in and chooses (for whatever weird reason) to post here end up deserving the behavior aimed at them. Anyone who comes to this board ought to realize certain actions are going to earn them derision and ridicule... maybe we should post a note somewhere visible?
Willful ignorance is probably the absolute worst thing you can come to this forum armed with. Iacchus, Interesting Ian, Kurious Kathy, and many others come in here and deliberately refuse to consider evidence that runs counter to their own opinions. lifegazer, Radrook, and a few others actually choose, instead, to (attempt to) undermine the very foundations of counter-evidence, and indeed argue that reason and logic are only hinderances to learning the truth. When presented with such a statement, how can reasoned intellectual debate continue? It can't. The offending poster, at that point, really has lain down the glove, as it were, and offered himself as a target for ridicule.
Yet I'd say most ridicule isn't of the usual empty name-calling sort; most ridicule on this forum (from skeptics) is there more to give warning to passers-by and lurkers as to the quality (or lack thereof) of information presented by the poster in question. After all, not everyone is willing to post through endless pages of topics to learn that someone really has no idea what he's talking about, and on the surface, a few woos really do sound like they know something.
Some are just annoying trouble-makers, with nothing to contribute, however; hammegk, T'ai-Chi, Iacchus, and a few previously suspended/banned members have a strange posting style, which I supposed is intended to make the reader think, but usually leads in a certain amount of ridicule for the original posters. Most of the time, their questions, meant to sound wise, can be answered either very simply, or have no meaning at all. And the few worth discussing are rarely ever actually discussed by the posters in question.
It's easy to see why so many non-skeptics get treated the way they do. Maybe if they stopped being so willfully ignorant, and started employing critical thinking and valid reasoning skills...?