photon6786 wrote:... or go knock on the people's doors and ask them if you could use their network.
You should see the look on people's faces when you do this. Fortunately for me, it was someone in my neighborhood that's seen be before, but you walk up, laptop tucked under your arm saying "I couldn't help but notice you've got your wireless wide open to the world, and comcast is down again. Mind if I use your connection from my apartment for a while?"
He eventually asked me about it and I explained how wireless works. In exchange for future use of his connection as a backup in case mine went down, I locked his AP down for free.
Anyhow, I'm with the rest. You shouldn't associate with an access point that you haven't been given permission to use. As far as how to "hack" (or be a l33t skr1pt k1dd13) on a network once you're on their wireless? It's no different than if you walked into their lobby and plugged into their network. That kind of stuff is VERY illegal, and it's people doing that stuff that gives all wifi hobbyists a bad name. Fortunately, lots of criminals have been busted for doing that kind of stuff as well, now that authorities are more aware of it.