I take the risk not so much to warm up the car, but to have the interior warm when I get in. I did heed the warning and cleaned out my garage today so I can squeeze my car in there, although the risk of sideswiping the garage door and ripping off my mirror is probably much higher than it being stolen :)

Remote starters are not that expensive anymore, and they are a simple solution to the problem. Should a criminal find a way to open the door while it's warming up, it sets off the alarm, The moment they step on the brake to put the vehicle in gear, it shuts off the car. And yes, there are even more safeguards should they defeat the initial barriers. Anyone who believes that they must run their car for the sake of warmth, there are ways to minimize the risk .

@David, That is an excellent solution! I never even thought about a remote starter. I did'nt mean to sound selfish about the warmth, I actually warm it for my kids sake more than mine.

have Lojack and can use the excuse to take the day off of work...

2 keys. Start engine. Lock doors.

start engine, exit car, ...!

start car, leave car unlocked, sit in 2nd floor window with assault rifle

I use the 2 key method, but that's mostly just so I can lock the house on my way out without having to turn off the engine and use those keys. I don't bother locking the car doors. My car is in the back of the house and my street is very isolated, so I'm not too concerned about theft.

2 keys. Start engine. Lock doors. Can equal = broken window. missing car. I do think that if one must do this and they have a garage, it's best to do it while the car is still in the garage to lower this risk. No matter what we do, no one is exempt from the risk (even sitting in the car while it's warming up).

Pull car out of Garage......go back inside and finish my coffee while I let the inside of the car get warm...