yea theres too many jerks out there, id always park in the garage, even if its a hassle,try www.save-on-security.com or this link
http://www.save-on-security.com/Outdoor%20Motion%20Sensor%20With%20Brains.htm
i have video cameras outside my house 
they work gooooood
Yeah I dont want to instutionalize my house but I am putting an alarm into it as soon as i hear from my buddy cough martino cough and clean out my crap filled garage and put her there.
Steve
i got 3 cameras LOL! best aprt i dont live in a hood, but people from the hood can come here.