This is just my opinion but,
I think if I was going to get a remote start, I would definitely get it coupled with an alarm system. For example, the alarm I have on my truck right now (which has an optional remote start module that I did not install) if I were to remote start the car, the alarm would stay armed until I came and disarmed it before climbing into my warmed up or cooled down car, depending on the climate. Mine will even turn off the car if I don't get to the car for over 15 minutes after remote starting it.
As for frequency catchers... they DO exist, although I'm sure they're pretty pricey and only owned by professional carjackers who can break into your car no matter what you do. But, most GOOD car alarm systems have a rotating frequency pattern (it will use a different signal everytime you press the button) that makes it much harder to intercept. Just remember, while alarms and rotating alarm codes will stop or deter common car theives, the committed will always find a way to break into your car!
I think if I was going to get a remote start, I would definitely get it coupled with an alarm system. For example, the alarm I have on my truck right now (which has an optional remote start module that I did not install) if I were to remote start the car, the alarm would stay armed until I came and disarmed it before climbing into my warmed up or cooled down car, depending on the climate. Mine will even turn off the car if I don't get to the car for over 15 minutes after remote starting it.
As for frequency catchers... they DO exist, although I'm sure they're pretty pricey and only owned by professional carjackers who can break into your car no matter what you do. But, most GOOD car alarm systems have a rotating frequency pattern (it will use a different signal everytime you press the button) that makes it much harder to intercept. Just remember, while alarms and rotating alarm codes will stop or deter common car theives, the committed will always find a way to break into your car!