"I once bought some s/h computers from a famous college in London via a "refurbishing" company; the HDDs were chock full of student data."
This is why we don't let things out of our department without wiping them first. "certificates of erasure" or "data destruction" aren't worth the paper they're printed on and when the chickens come home to roost, they don't land on the recycler's doorstep.
Biting the hand that feeds IT
