man that sucks. my friend has a viper alarm system but is very sensitive. we would barely rock his car and his alarm would be screaming. but with a car like yours then a sensitive alarm wouldnt be too bad. i HATE people who have no respect. but your a man with a fairly nice build. they were probably scared when u came out lol. but it wouldnt be a bad idea to invest in some sort of security for your car. maybe even some surveliance for it too. what did they say when you confronted them?