we have a Lexus catloc fitted....after the original cat was cut off on our drive. thieves held the front door so my wife couldn't open the door. I was out. I said thankfully people weren't trying to get into the house. a car is a car after all.
Catloc....well....I don't think you will ever stop a thief.....but if they are after a quick getaway...a catloc might at least make them think. Or.....sadly...look at the car next to you that doesn't have one fitted.
When ours was stolen they of cut the alarm cables through the front grill. I now park the car (wherever I can) will the front facing a wall/door....as close as I can get....to try and stop access to the alarm sounder cable. Has that helped??? ....no idea