I am getting this too. 37 today on my site. Sorry to say it, but they ramped up soon after I registered for this forum! Previously I was getting some very obscure totally unintelligible text and web addresses, about 10 a week. Now they are actually trying to sell products and give links to real web sites. The previous items above at least tell me there is some script i could use to fend off the problem.
Only, I'm still a novice and would appreciate some more guidance on what to do in this situation.