The practice of overbooking flights needs to be changed,it just causes to many problems.
The idea of increasing the amount paid till someone bites is a good one.Really like this idea if they won't outlaw the practive of overbooking.
The idea that because you bought a ticket you can refuse to abide by the crews command to leave the plane? Laughable.
The doctor is an idiot. NO ONE dictates to the flight crew they aren't leaving. Argue why you need to get to your destination, give them a number to call that proves its an emergency, but once security shows up your done.
The fact he choose to resist them, ridiculous, he should be charged with some sort of criminal mischief(or whatever the legal charge would be) and potentially barred from flying again on United in the future.
Good luck with the lawsuit, they didn't commit a crime, the doctor did.
It was a shitty luck of the draw he was picked to leave, the level of entitlement expressed is astounding.