spam comments and spell-check

I'm still battling the spam comments; at least once per day I get one of the Asian porn comments, but it's always on an older post, so it doesn't show up because I have moderation set for anything over three days old. Since this particular one was always on the same post, one with a peach cobbler recipe from last July, I decided to delete it and see what happens. I occasionally get spam on new posts, but not often. I simply delete them. It isn't real people doing the dirty deeds, it's "bots" set out to troll the Internet (by real people).
I could avoid all this by (a) using word verification for comments or (b) blocking anonymous commenters. Either method loses commenters, so for now I'll keep doing what I'm doing. It's rare that I get a legitimate anonymous comment, but when I do it's very special because it's usually someone saying, "I've read you for a long time" or "I read your blog every day." It's a treat to hear from someone like that, somebody who has never come out in the open before.
On another note, am I the only person whose spelling seems to have gotten worse since spell-check appeared on the scene? In the old days I'd stop and think about how to spell a word; now I just type it in any old way, knowing spell-check will give me the proper spelling.