You wouldn't have to worry too much about associating with a different base station and accidentally opening your garage door while you're nowhere near home.

And I can guard that by only allowing contact from behind my access point, not from the internet.
(If your home computer is reachable from the net, then you'd want to run ssh over a non-standard port that your firewall filters.

Definitely. There's a firewall towards the internet, and another towards the wireless lan. The wireless is definitely "non-trusted".
If you had an adversary who was willing to stand next to your car, in the parking lot, and maintain a separate connection to a conspirator standing next to your garage, they could possibly convince your car that it was next to your home

Ahh. The "MIG in the middle" attack! Need to use a mim-proof autentication. But in any case, I've made sure the door from the garage into the house has it's own lock, and I can have the computer raise an alarm if that dor isn't opened within a few minutes of the garage door being opened.
Imagine when a war-driver (or a sneaky friend of yours) associates with your in-car base station. Assuming they use the appropriate tools to get around your WEP key, now they can run emplode against your car stereo. If somebody wanted to give you a hard time, they could replace all your music with Wesley Willis.

Arggh! Didn't think about that possibility. I, guess putting a firewall in the car is overdoing it...
Now, how do you propose to close your garage door? If you closed it with your normal beeper, your empeg might associate with home and helpfully open the door again for you!

Suppose I could just build in a timeout. "Don't reopen the door over WLAN within 120 sec of closing it". In an emergency, I can always reopen the door with the beeper. But clearly the empeg user interface lacks the essential "open/close garage door" buttons