Originally Posted by arelius
Okay here's how it works,
Let's just say that my neighbor has wireless internet at his house. He is the one who has the network cards, routers, etc... connected to his computer inside his house. Now, because it is wireless internet there a certain area where you can access that wireless internet. For example, maybe his wireless internet spans out 50 feet on every side. So if you, his neighbor, are within that 50 feet, even if that 50 feet also includes your house, you can access his wireless connection with your ipaq or computer that has the ability to pick up his wireless internet. Assuming he doesn't have a firewall or somekind of password on his wireless account to only allow him to have access to the wireless internet, then you can use it too. This applies to any geographical location. As long as they have the wireless internet available you can turn on the Wifi on your ipaq and have access to the internet as long as you are within range. Most of the time they will have passwords you need in order to access there wireless internet. Most schools have this available for students. You just login with your student id and password and then you surf the net. I hope that helped.
This is known as wardriving. It is in fact a felony. Are you likely to be prosecuted for it? No. Is it a felony? Yes. (The analogy you hear is, just because someone's house is unlocked doesn't mean you can go in and watch his television.)
The people who do get hit for wardriving are usually using someone's wifi network for high bandwidth use, or else consistently tapping into someone else's network (like connecting your home pc to your neighbor's wifi access because you're close enough to do it. It's considered the equivalent of tapping into your neighbor's cable.) A casual onetime connection of a PDA isn't going to get anyone's panties in a twist.