There is a website called "Pilot Share The Ride" on which people wanting to go from A to B can advertise as pax, and pilots going from A to B can advertise as pilots. Now if a pilot says "I'm going to be flying from LAX to Tucson on tuesday at 10am" and a PAX then contacts him and says "Great can I come, I'll pay my share" then it is legit. Likewise if a pax advertises and says "I want to go from LA to Tucson on Tuesday" and a pilot is already intending to make the trip then again it is legit...No one has been holding out. I guess this could be extended worldwide and into Europe...