I just got hit with 4 5 6 comment spams from the same asshole, advertising the same 3 products in each one. All comments here must be approved by me before they appear, so the spammers are just wasting their time since none of their spam will get past me without being deleted. I also block their IP address in my .htaccess.
Update: that spammer won’t be bothering me any more. I added a few lines of code to reject his comments before they even get to the approval queue. Tomorrow I’ll expand it to handle other kinds of spam.