AFAIK, only 1 person has been arrested for it. And he got arrested because he was sitting in his car in front of a house in the middle of the night. If you're inside your own house, "borrowing" a Wi-Fi signal from the neighbors...the chances of getting arrested are pretty much slim and zero. Good luck on the neighbors even realizing that you're using their signal.

There are also several legal challenges about to go up for those laws. Can that signal be considered "private" if you're broadcasting it out, etc.