who says it was knowingly? that user may (like many people) have their head in the sand as far as malicious code is concerned. then again, you may be right, and they just don't give a ****.

that's life... Best thing for you to do (and it seems that you already do ) is to be on point as far as scanning files for virii, etc. to avoid problems. That said, I understand how frustrating it must be to download a big file, only to have it be infected...

Jungle_tek