I've done several walkthroughs of the downtown area where I live, and have been disgusted at the number of open wireless access points in the area.
One of these days I'm probably going to go write up a news article about the concerns of wireless and get it into the local papers.
That way I may get contracted to help set people up with secure wireless.
I'll probably just rent out a space at the library or somewhere in the area to teach a class on it.
Good thing I can find the tools I need for it.