Right, an alarm alone isn't gonna eliminate theft. 100% true. But this is the difference. For example, I had a Viper 300ESP, it had a shock sensor on it but you had to actually touch the car in order for it to trigger it. On a clifford, you can get a dual stage proxy sensor that will trigger a warning chirp if you get within a user programmable area of the car. You don't have to touch the car at all, just get close enough and it will warn you. You can also get a digital tilt/motion sensor which will trigger the alarm if it comes off axis due to either being jacked up (trying to tow or steal rims) or by being pushed. Which is what they did to my car, pushed it out of the parking lot and then hot wired it. You can also get a wireless immobilizer which will interrupt any circuit you want it to be it, fuel cut off, ignition, starter, whatever. And no wires to trace hence the word "wireless". But to me, the icing on the cake is the fact that the Clifford alarms, unlike Viper, are built using "always on" circuitry. The clifford alarms have to receive a signal from the brain telling it to shut up, while the Viper needs to recieve a signal from the brain telling it to make noise. When you cut the wires on an alarm that is "always on" the siren will sound because its not getting the signal telling it to shut up. So while no alarm is gonna make your car 100% theft proof, a Clifford alarm will be alot more challenging and less likely than a car with a Viper alarm to be stolen. The key is layering security, alarm, locking device and especially FULL COVERAGE INSURANCE. A little bit of common sense doesn't hurt either.