Became a bit of a hobby when I bought the house. Unfortunately I've known a few too many of the people I want to keep out, so it's not something I'm complacent about.
I only use the driveway bollards if we're going on holiday, but the carport bollards are in constant use, because it's a car I hardly use. Even if they took it, it wouldn't get far, it's left on a valet map so won't go over about 20mph and it's tracked.
If you've got the keys in a Faraday bag, then your car is secure from relay, so I would look at securing your house so they cant get your keys.
I don't think bollards are preventing guys in balaclavas. If someone tried to smash my windows they would still be there in the morning.