Another tactic is to smash and grab garage door openers from parked cars on streets around stadiums. Home address is usually on papers in the glove compartment. Thieves go to home and use garage door to enter.
It sounds like you should place the address of someone you hate prominently in your car. ;-)
That's why I would never leave a garage door opener in my vehicle. All but one of my vehicles have Homelink, but if a vehicle is left outside I will either clear the Homelink or I'll use the lockout feature on the garage door control in the garage. Now all my garage door openers are wifi enabled, so I can open and close them with my iPhone from anywhere I have cell phone coverage, so no need for an opener in a non-Homelink vehicle anymore.