Anything free usually comes at the cost of someone else. Even if you were given something, for example a present, it most likely came at the expense of the person who gave it to you. As far as pornography goes, I do not agree that it is ethical or morally right to make or produce it, but that is not the question. The question is whether or not it is ethically and morally right to get it for free.
If a man or woman wishes to share images or videos of their body with YOU that is one thing. If you decided to take them and put them on the internet for everyone to see without consent from that person, I believe that you have just stolen something from that person, and once posted on the internet it is often impossible to get back. Those images or videos will be shared by other people, who will share them with other people, who will share them with other people, etc… Pretty soon a lot of pornography viewers have seen that person in a light they they had not wished so many people to see, and if ever seen in person will be pictured as an object with no clothes on rather than what they really are, a human being.
As far as the industry goes, although I may not agree with what they are doing, this is America and those people have the freedom to do with themselves as they wish as long as they are of age, not breaking any laws, and not endangering any other people. If it is a job, they are trying to make money off of it and should get paid the fee that they had requested before having agreed to make or produce any pornographic material. If this material is posted, for example on the internet for sale, there are usually terms and conditions you must agree to adhere to before finalizing your order. Often times when buying film or other media you must agree to not redistribute it in any way whatsoever. If that was the case when you bought your pornographic material, if you choose to view it yourself, fine. If you take that material and post it on the internet for everyone to view without paying a dime, then you have broken the agreement between you and the company or person you bought it from and should suffer the consequences.
Most things, as stated before, are not free in this world, even pornographic material for the most part. Everything comes at a cost that must be paid otherwise you may eventually suffer the consequences of your actions.