I find it amusing that people don't think a virus can wipe your hard drive..
#1 not all virus' are written to get open security holes, certain malicious individuals just want to make my life difficult (Ever told an already PO'd customer his data is irretrevable unless he wants to pay upwards of $80 an hour to get it done.)
#2 it can be done therefore people will for it, jesus even a script could do it... I remember the old day's of IRC there was a rumour about it, dun know if it was true but in theory it could be done..