I’ve got Pandora after seeing a friend of mine who fits alarms for a living find a ghost, rip it out and start the car in 10min.
The package I have disables CAN, has no tag no start, and even if you bypass that immobiliser, it has another one. On top of that that factory alarm still works too.
if after all that they do start the car then they are welcome to it for all their efforts.
ps also have a Stoplock full steering lock as a deterrent