I’m a little late to this thread, but let me throw in my two cents, and present another way of looking at this… a behaviorist view.
While one could legitimately argue the validity of behaviorism, let’s, for sake of argument, assume that the following is true:
Behavior is a function of its consequences.
With this world-view, it is generally held that there are four types of consequences…
[ul]
[li] Positive Reinforcement[/li][li] Negative Reinforcement[/li][li] Punishment[/li][li] Extinction[/li][/ul]
Positive Reinforcement
Where you get something you want, which increases the likelihood of that behavior again. For example, you start a thread where the number and quality of the responses are exceptional, or you receive kudos for the OP. (“Mmmmm. Feels good to get praised.”)
Negative Reinforcement
Where you avoid something you don’t want, which increases the likelihood of that behavior again. For example, you want to avoid getting hauled into the Pit so you don’t flame the OP or the other posters. (“Hmmm. It’s kind of nice not getting roasted, maybe I should be like this more often.”)
Punishment
Where you get something you don’t want, which decreases the likelihood of that behavior again. For example, you flame someone and get hauled into the Pit and roasted. (“Ouch. That hurt. Not gonna do that again.”) This one is tricky, because in some cases, the attention-getting aspect of getting hauled into the Pit is a desirable consequence, which would make that Positive Reinforcement rather than Punishment.
Extinction
Where you don’t get something you want, which decreases the likelihood of that behavior again. For example, you place a troll post to raise the hackles of the Teeming Millions… and no one responds. (“Hello. Tap, tap, tap. Is anyone there? Doesn’t anyone care that I believe there never was a Holocaust?”)
Extinction is one possible consequence of the Ignore feature. I personally don’t think enough people will use the Ignore feature to make any noticeable difference in the SDMB. And if I’m wrong, and a lot of people do use the feature, then perhaps the end result will be Extinction of boorish/jerkish behavior, which would be a good thing.
FWIW, regardless of what the final verdict is, I’ll probably never use the Ignore feature. I enjoy looking at the “car wrecks” too much.