I get an astonishing amount of comment-spam, nominally about dresses - wedding dresses, prom dresses, square dresses and how to fold them, and so on. None of it ever appears so I don't know why they bother, but simply deleting it all from my email queue is becoming ever more tedious. So I've changed one setting - old posts are now closed for comments after 60 days instead of 360, in the hope that at least some will now bounce off.
Oh, and a corollary of all this is that I'm far less careful than I used to be about wading through "comment requires moderation" emails. If you've got one that's stuck, mail me separately.