I hate them.
Hey, if you guys spot any comment spam on my site, can you let me know? Today was a bad day, and I had tons of it splattered all over the place.
I put in a little hack to foil spambots. It should work; I haven't received guestbook spam since I modified the script there, either.
*UPDATE* Looks like these guys are spamming manually. Many of them are coming in from Russia. Who has time to manually spam web sites? That can't be very cost effective.