Comment spam sucks

I’m being hammered by a new round of comment spam, and this one is really baffling. It’s well coordinated, coming in tightly packed bursts from all points of the compass. No IP blocking can stop it, and the strange thing is, there’s no text to it. Just a few random letters in each comment along with a plausible sounding name. What are they selling? What is their motivation? Each new invasion of spam has puzzled me at a different level. Just when I became hardened to the fact that of course unscrupulous advertisers could never be stopped, I get bowled over by a new phenomenon: absolutely pointless site-clogging random spam. It’s as if someone is practicing for a denial-of-service attack. At some point, I will need to use those funny picture queries to stop the noise. Sigh.