Techno - How to steal WiFi
The funny thing is I’ve already did that with some of my neighbour when my WiFi connexion started to twitch. I wanted to figure out what was happening and finally entered into one of the WiFi router around, using “admin” as a password (I suspected him to be a casual, laptop user, of his router anyway). It worked, of course.
Then I changed my neighbour’s channel to figure out if he was jamming mine, but unfortunnately, it wasn’t the case. I set everything back, and closed the connexion, after asking to myself if I’d better to make a mess of everything then shut his connexion, as a matter of lesson. Answer: nope. My neighbour is also the guy who often shovels the snow in the building’s entrance and I won’t make something that bother him. 
“Every techie I know says that you shouldn’t use other people’s networks without permission. Every techie I know does it anyway. If you’re going to steal—no, let’s say borrow—your neighbor’s Wi-Fi access, you might as well do it right. Step one: Lose the guilt. The FCC told me that they don’t know of any federal or state laws that make it illegal to log on to an open network. Using someone’s connection to check your e-mail isn’t like hacking into their bank account. It’s more like you’re borrowing a cup of sugar. (Unless you hog their bandwidth by watching lots of streaming video—that’s like hijacking a sugar truck.)”
Here’s the link to this interesting article from Slate.com