You're talking about a motion alarm.....which my stock system does not have, but could be added easily enough. There are unlimited ways to rig up your alarm system. My last silent alarm system came with a pager....made no noise at all, just beeped the pager (if you set it that way). Let you take out the thief by yourself.
The whole idea here is to put doubt in the mind of a potential thief. This setup looks real enough to scare off all but the most hard-core car thief. Face it....your car can be stolen or just broken into by somebody determined enough. But there are of plenty of cars that are easy.....not much sense for a thief to pick one that may be a problem.