The Taxi Cartel of Prince William County
I'm no lawyer but it's my understanding that Unless you're Yellowcab, Manassas Cab, or Washington Flyer you can be charged with illegally operating a taxi if you give someone a ride and accept money in Prince William County.
I've noticed people on craigslist posting they give rides for money I guess they try to stay under the radar and not get too popular.
Reason has a story of someone getting charged without even accepting money. http://bit.ly/ct3D3M
