It all depends on the contract. Presumably, a bus ticket would say something about not endangering or disturbing the other passengers, but if you just, say, twe

It all depends on the contract. Presumably, a bus ticket would say something about not endangering or disturbing the other passengers, but if you just, say, tweeted angry messages to the president of Greyhound, it would be a hell of a stretch for them to find grounds to legally void the contract (i.e., kick you off the bus).