My car is garaged and we live in a decent neighborhood, but if someone really wanted the car, they could get in and steal it.
For at home, I bought this faraday box to set by the door, so all of our key fobs can be dropped in there when we get home:
On Amazon
Faraday pouch for walking around areas where the fob could be boosted or cloned:
On Amazon
And for when I am staying at a hotel, for track days or other stuff, I'll be using the above key fob bag in addition to this "club" that is a modified version to make it harder for a thief to hack saw the wheel and pop off it off:
On Amazon
Fingers crossed!