I don't think that was the explanation.
Don't get me wrong, I don't care that the Navy interfered with our garage doors. I'll pay the price of getting out of the car to defend our freedom. Nor do I think they had to tell us if they were. If it was some ELF program or something else, no need to shout it out to the world. It was just part of living in Pt. Loma.
I wonder if it still happens.
Here are some year or two old links about the problem.
http://www.freerepublic.com/focus/f-chat/1747553/posts
http://www.cbc.ca/canada/ottawa/story/2005/11/04/ot-garageopen20051104.html
But I see you already posted to the former...
I could have sworn Detroit was experiencing the same anomaly.