I have the anti hijack on my alarm but i always keep the key and the alarm fob seperate cause if they nick the car i just point and press button 2 and in 10 seconds the engine shuts off and the doors lock !
Sorry to hear of your incident m8.
My philosophy is to be Paraniod Always it helps my e partner was a pub manager and i spent 6 years living in pubs and believe me being on your guard all teh time is a good thing !!!!