Parking lot at Starbucks is easier than parking my my driveway. There is no street parking here. I had to install another router just to reach the other side of the house.
The nearest Starbucks to us is about a 2 hour drive. And Wardrivers usually have some very sensitive antennas which means they can grab your signal from much further away.
A buddy of mine built a DIY antenna for his wireless card and can pick up the McDonald's free wifi from several blocks away, yet when you use a normal laptop you can barely pickup the signal outside of the parking lot.