Just think of it as a couple of bored techs at your ISP monitoring what you're doing and tee-heeing about not letting you download a file..
I'd blame it on the guy I was sending all the Nimda probe reports to (about all the people infected on my isp) if it happened to me. (He seemed a bit upset when he informed me that he was no longer on the Nimda infection team.. *grin* )