Sounds like you're stealing the connection.
For these reasons, this is why we suggest to people to secure their wireless networks using WPA Security. Do you know, the persons internet your stealing can also collect information on where you're going? Do you want the person to steal your credit card information? It can happen. Since your user profile says you live in the United States, why not go and contact Verizon for their cheap DSL for $14.99 for a year, then it goes up to $21.99. That's a good deal and cheap, too.
The persons internet you're stealing and also be in jeopardy. If you go somewhere and download music, then their ip address comes back and now their in trouble with the music industry.
Maybe you can remember this. People would go out and steal the cable connection from their neighbor. They found out it's illegal and the cable industry found the illegal hookups and disconnected them. The cable company now prosecutes the people for stealing cable.
Are you going to be the next person arrested/
Rick