Track day boys, it is good for this - leave the handbrake wire off, then when you get in the pits, park it on the flats, jump out, alarm it and leave it cool down for 5 or 10 minutes on it's own. I have seen cars nicked on track days when the owner has left it running to cool down, and was chatting to other drivers about their last fab lap. There is so much activity in the pits, that it is too easy for some one to jump in your car and drive off!
Turbo timer actually makes it more secure - at least the door is locked....
And anyway, haven't you all got trackers or trackstar?