I was in the Regionals for 10 years doing hub flying. Weather, overbooking, crew out of position requiring paid pax to be offloaded. Very common. Sometimes we wasted so much time waiting for volunteers the flight ended up canceling anyway. People want cheap tickets and the airlines don't have crew standing by in every city.
Some are saying the crew should have taken a rental car. Are there that many people on this board who have so little knowledge of airline operations? When YOUR flight the next day is delayed for hours and everybody misses their connections and now needs hotels and re-accomodation on other flights (that are probably full) that is OK because one emerging American folk hero refused a legal order from Law Enforcement officials to deplane?
Our contract now does not allow DH in a jumpseat. Some are still tempted at times by ground staff to take one, it is a personal choice but doing so can create an expectation that undermines the contract and your fellow workers and can screw over another guy who is trying to commute. Management understands this , no longer generally done.