Originally Posted by cbn42

Is there any actual evidence that this has happened in even one case, or is it just speculation?

It really makes no sense to me. Even if a man and his wife are flying to Tokyo, they might have kids or other relatives who are staying at home. Besides, if someone is really going away and leaving their house empty for an extended period of time, everyone from the taxi driver to the postman would be aware of this. The TSA would be the last people I'd worry about.