watch out if you start vehicle prank wars at work. I had a guy at the place I work at one day empty all the trash from his trucks bed into my trucks bed, thought he was cute. I told him I was off at 9 that night and if he didn't take it out that he would get the trash back plush interest. Well he didn't take it out so the next day I wired an alarm siren into his brake lights, and then broke into his truck and put the trash inside. The whole store knew about it and was awaiting him to leave work that night and in the middle of while I was selling something one of the salesmen ran up and with a big shit eatin grin yelled "HE'S LEAVING NOW C'MON C'MON C'MON!!!" and then sprinted back across the store. Naturally the customer was curious as all heck so I told him it would probably be worth his time to watch the show that was about to happen. So we went out to find the ENTIRE STORES staff standing there watching cj start his truck. I got lucky that I used an alpine siren that had a soft activation feature that meant it started off soft for 3 secs and then went full blast. So the first 3 times he tapped the brake to start it, put it in drive, and then start rolling didn't get into the full blast but it was loud enough to make him look back each time. Then he got to the main road where it was busy and had to wait and when it went into full blast mode he really started looking around and it was this time he noticed the entire store(now customers and all I mean you could have robbed the place silly if you had been in there) watching, pointing/laughing. He didn't want to admit defeat so he drove off anyway. Next day he tried to wire it into my fog lights but I notices the wiring hanging down and then he laughed that he took the bed off of his truck so I could not put anything in it(he was getting it painted). When I walked by his truck I noticed that with out the bed I had full access to his fuel pump wiring now right up on top so I got a radio shack project box and proceded to modify one of the "extra" store keyless entry systems so that I could simple slap it on his frame rail and connect the two wires going to his fuel pump to remotely cut power to the pump. You can't imagine how disappointed I was when I came back that night to find out he mouthed off to one of the managers and got fired.
Morel of the story - don't dick with an installer/mechanics car.