I would
NEVER keep my keys in the bedroom..... After our Bora was stolen whilst we were asleep in bed it was used in an armed robbery some 50miles away - and we live in an ordinary suburban street - .... I am sooooo glad that we weren't woken up in the middle of the night with that gun pointed at our heads... It could possibly have pushed 'just having our car stolen' right up to 'attempted murder'!!!
If the scum want the car then let them take it..............
REMEMBER...
THEY DO IT FOR A LIVING....
DOESN'T MATTER WHAT YOU 'THINK' YOU'D DO IN A SIMILAR SITUATION, THEY'VE PROBABLY GOT IT COVERED!!!
By all means have the house alarmed (so they'd go on to the next house with a desirable car) and possibly have some kind of remotely operated fuel pump switch so they only get down the road until the car conks out..... But to think you'd be able to confront them and just function in a 'normal' manner having just woken up... I'm afraid you've been watching too much James Bond
