Re: Fighting back
DEL C:\*.* wouldn't work, even if the user had admin privilages it'd only wipe out files on the root directory of C and not subdirectories. Five stars for effort though and a very good effort off the cuff.
"DEL C:\*.* /S /Q" might work, though it'd take ages and be prone to being stopped. My first thought when it comes to quickly causing total disaster is getting them to go into regedit and delete HKLM/Software.
Does anybody have a easily restored Win7 VM they don't mind nuking a few times to find the best way of killing a scammers computer quickly?