Compassionate laser alarm: 'Less lethal'

It's one of the most worn-out cliches of all action movies: the laser beam alarm system. But if they've been around for so long, why they haven't become household staples in today's security-obsessed society?

The latest example comes from Arizona-based company Ionatron and its "Portal Denial System" (sounds so RoboCop). Created for the U.S. government, it fires a stream of "laser-induced plasma" across any entryway, though SCI FI Tech says the operator has the option of making it lethal or "less lethal." Come to think of it, maybe it's not such a good idea to have these on the consumer market after all.

[bknowledge]

Not for the home

I'm a dead sleeper, which means very little wakes me up but how is anyone going to sleep with that thing making all that noise at night. Get a dog, it keeps working without power and will shut up with a shoe.