The Definition of Irony

You've got to love this story from the associated press.

Basically, students in some New York schools have found a ring tone for their cell phones that adults can't hear, and the students have been using the ring tone to text message each other in class. Here's the kicker:

The ring tone is a spin-off of technology that was originally meant to repel teenagers -- not help them. A Welsh security company developed the tone to help shopkeepers disperse young people loitering in front of their stores while leaving adults unaffected. The company called their product the "Mosquito."

The irony is priceless.