A policy I may have to steal
Truth be told, I almost never delete comments, and then usually only when they're comment spam or someone reposting an entire copyrighted article, rather than a link to the article with excerpts. But it is perhaps worth reminding my readers (in somewhat less blunt language than ahistoricality chose to use) that, given recent blog pissing matches degenerating into blustering threats of legal action, I do reserve the right to delete any comment for any reason. (This blog is what I like to think of as a benevolent dictatorship, not a democracy.) It's just that I very rarely choose to exercise that right. I could if I so chose, but almost never do. I like to think that's part of my charm.
I hope you agree.