I've changed my mind about trespassing signals. I received some mail last week that was misdelivered. I don't think so. This situation is analogous to illegally intercepting signals that trespass onto my property. If it is not intended for me, I shouldn't receive it.
Signal theft is wrong.
It's kind of like eavesdropping. Whenever you're taking something that is not yours nor is it intended for you, you are stealing plain and simple. If you believe in the Golden Rule, then you'll know that signal theft is wrong. However, I don't know if the U.S. should be allowed to go after signal thieves in other countries. It brings up too many possible sticky situations.