Part of why we call it junk mail is that it is not much more than that.

CNN: Medicine in your junk mail

Scientists of the day thought graphite was a form of lead--that's why we still call the stuff in pencils "lead, " even though it's graphite.

FORBES: Magazine Article

That's what we call hacking, and that's why we have put a ton of work and effort to make sure it doesn't actually occur.

CNN: How Microsoft learned to stop worrying and love open Kinect