CAMBRIDGE — Dozens of police officers descended on the Massachusetts Institute of Technology campus Saturday morning, moments after receiving a threatening message about a gunman that turned out to be a hoax.
But MIT students were not notified about the threat until more than an hour after it was first reported, when the school’s campus emergency messaging system sent a mass text message to students instructing them to remain indoors.

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It's called "swatting" and it happens all the time to celebs in LA. Ashton Kutcher got swatted which was actually funny since he's made a career of punking people. Of course, sooner or later somebody is going to get shot.