Why right-wing blogs don't have comments

Says InstaPundit:

WHY I DON’T HAVE OPEN COMMENTS: Another reason.

Bollocks, Glenn. OK, so there’s a porn site that’s currently spamming blogs with comments that mention “Lolita” or “Preteen”. That’s fine, we can deal with it, and, crucially, it’s only been an issue in the last week or so. In the months I’ve been reading Instapundit, I haven’t yet seen an indication that the blog was flirting with comments.