Really Bad Blog Spam

As many of you know, I fight a daily battle against spam robots who attempt to post an average of about 150 spam comments on the site. Most of them, these days, are for ringtones. Free ringtones. I don't get it, but there seems to be no offense beyond the nuisance factor of spam itself (unless there is something behind it that is nefarious, but I am not about to click on the thing to find out).

However, once in awhile I will get a slew of really raunchy, nasty things, things which, were they to actually be available, would be illegal. I am guessing that the majority of these sites are coming out of Russia and other third world places where there is not much regulation of these matters.

So, do any of my internet whizz readers know if there is any point in alerting any law enforcement authorities of this stuff, or would I be wasting my time. Also, which agency would be the ones to handle this sort of thing? FTC?