Do you allow comments on your blog? Do you moderate them? Why or why not? Some thoughts on how to handle blog comments:
I, too, use filters and anti-spam plug-ins, but still to often find spam on my many blogs. I now favor using re-captcha or some other simple question-and-response plug-in on my comments in order to keep out the robots.
I moderate comments from first-time commenters only, partly because it helps me catch the few spammers who escaped my filter, but mostly because I’ve had a problem with a few cranks who have tried multiple ways of leaving unpleasant comments.
I do have a comment policy that’s written pretty strongly, but it was in direct response to some issues I have having last year. (See cranks, above.)
As for negative comments, I don’t get too many, but when I do, I tend to leave them there and then respond to them.
The comments that I will delete for sure are those that are only marginally related to the post and are trying to sneak in some sales/marketing for a person’s product.