Comments on Comments
I'm sorry to hear about your troll problem. I honestly can't imagine what motivates people to be so nasty.
Here are my feelings on comment moderation:
I think of my blog as my personal space - sort of like an apartment in the city, or a beach house if you will. By posting my blog up on the internet it's as if I've opened the doors to whoever would like to attend my little house party. Normally I find the type of people interested in the party I'm throwing are thoughtful and respectful and often come with drinks and snacks (or good ideas) to make the party even better.
However, with such an open door policy, once in a while I might get some sort of deranged lunatic who drops by just to make a mess of things. Perhaps he curses at my guests or falls asleep in my bathtub... Well, I wouldn't tolerate that in real life, and I certainly won't tolerate it on my blog either.
Sure, a few rude or lude comments are ok here or there to keep things interesting by when your blog is truly under seige you have to take the reins. So moderate away Hermione, wave your wand and make those nasty comments dissapear, and if your wand gets "accidently" shoved up
a troll's nose so much the better.