Well, comment spam is on the rise nowadays. And, to a very large extent. I'm receiving several comments starting with the usual "Nice blog ...", but then proceeding to solicit me to visit some xyz site to make $$$ !!
Makes me wonder if I should turn off commenting. Let me wait and see. If blogger.com started a "block/ban" commentor option, or something like that, it'd get interesting. Of course, there are many ways to try and beat the system, still something'd be worth a try.
Update: Forgot that blogger.com had "Word Verification". Turned it on. Let's see if that reduces the nuisance !