via Yahoo:

Box of condoms leads to evacuation

ANKENY, Iowa - Several classrooms at Des Moines Area Community College were evacuated after college officials became nervous about a suspicious package.
College officials called police and postal inspectors after the box was delivered Thursday. What they found inside wasn’t a bomb — it was a box containing 500 condoms.
The package was sent to a teacher of a human sexuality class, and was sent by a person who had been a previous speaker at the class, said Rob Denson, the college’s president.

Moral of the story: If you want to mail a box of condoms to somebody, send it to their home address.