You are looking for something like a sentry gun.

http://www.paintballsentry.com/

On Mon, Jul 20, 2009 at 1:13 PM, Mike Miller
<mbmiller+l at gmail.com<mbmiller%2Bl at gmail.com>
> wrote:

> On Mon, 20 Jul 2009, Dan Armbrust wrote:
>
> > On Mon, Jul 20, 2009 at 11:00 AM, Andrew S. Zbikowski<andyzib at gmail.com>
> wrote:
> >
> >> While technology is great and all, it's no replacement for doing the
> >> simple things like rolling up the windows, locking the doors, and not
> >> leaving your keys in the ignition. I swear that someday I'm going to go
> >> over to my parent's house and drive their cars a block down the road
> >> just to prove a point...
> >
> > Heh, depends where you live.  Where some of my former co-workers live in
> > Minneapolis, they finally learned after about 4 broken windows that it
> > is much easier to just leave the car unlocked, and with no valuables
> > inside.  That way, most of the miscreants won't break the windows when
> > they come by - they just check the car, and move on to the next one....
>
> A friend of mine had his window broken twice so he left the car unlocked
> to avoid more broken windows.  It didn't work.  His thieves were so stupid
> that they broke his window even though the car doors were unlocked!
>
>
> > What would be really cool is if you could integrate some motion detector
> > software into the linux system observing the camera, and then have it
> > take some sort of action - blast something over a loudspeaker, turn on a
> > water hose, aim and fire a turret mounted paintball gun, etc.  The
> > possibilities are endless :)
>
> Sure, but be careful of how you do this.  You don't want to shoot a
> paintball into your postman's eye.  Strangely, you also don't want to
> injure a thief:  I have heard of cases, and I think they were true
> stories, where thieves were injured by booby traps, so they sued the home
> owners and won damage awards.
>
> Mike
>
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