I hate to do this, but the spammers have pushed me over the edge. Until I figure out if Blogger allows me to delete spam comments, people will need to log into Blogger to comment. I'll be looking into setting up a guest Blogger account for people without their own accounts, but until I do, you're stuck. Sorry.
I'm beginning to think that spammers should be declared "digital outlaws," i.e. any form of hacking or other electronic attack against them would be without legal penalty. This is getting ridiculous. I mean, my blog usually gets less than 20 hits a day! If they're spamming me, they've got to be spamming everyone. The h*** with that!