Pornstars are people to and for most of them porn is just a job, nothing more, nothing less. Everyone has the right to decide what to do with their bodies as long as they're doing no harm to anyone (without that person's consent) or breaking the law.
What right do we have to judge others by our own morality and expect them to live up to it? What about if someone ridiculed and looked down on you because of your job? I'm sure you'd consider them an ass so maybe you should consider that when you pass judgment on others.