If I'm moderating all comments before they're published on the website, what's the problem? I mean, I've got a simple tech blog. I'm not going to publish random drive-by comments. Only comments that relate to my blog are ever going to be published. Am I making sense?
Does anyone in your blog comments ever discuss circumvention of DRM?
That's a criminal offence in the UK (two year prison sentence in some circumstances). Do you have a good feeling for what might count as incitement in those circumstances?