On my Golf R you can disable the keyless entry by locking it with the key and then holding finger over the lock sensor on the door after the mirrors have folded in (google it and you will find a video) - bit of a faff but thats what we do and it works well.
Also I would think about the locks on the doors of your house - google lock snapping if you have euro style locks on your doors - I totally knew nothing about this despite having done all the usual CCTV, home alarm etc etc. - Pretty much went straight out and replaced all the locks.
I have also read a lot about autowatch ghost but I agree with everyone else - if they are willing to get past all the other measures I have taken I dont want them coming back to face my or the wife to get the autowatch code - they can take the car.