...this open letter is redundant. thegman was right in that copywrite only exists to protect those making a monetary gain from it. Sure, let's go back to pre-copywrite days (1776 or earlier) where art was truly made to what it was.....art....not money.
We all want to think we're entitled to something we create, but in all actuality, nothing is original.
Let's take copywrite to the extreme for a minute. If everything was patented and kept in lock in key. not a single person in this forum would be taking photographs. Who here can actually create a camera like the one they are using (sans pinhole)? Patients and copywrites only exist to a degree and insofar as they allow the economy to run in a very controlled atmosphere.
None of our ideas are original. They feed off other ideas, "re-created" by others. Let's not all let our egos explode thinking that us photographers are the epitome of artists and are entitled to money every time we click that shutter. If we don't want people using our images, don't put them on the internet in high resolution. You can post them in small, web-quality that cannot be printed with any quality whatsoever. We all should know the risks of this by now.
Lastly, as photographers, we need to at least acknowledge the existence and entitlement of our subjects. As x-ray points out, a substantial amount of his/her success is on someone else's life and their unfortunate death. I would imagine that if we are to create a pie-chart on the value of our work, at least some contribution needs to be made to the subjects where possible if we are to be consistent with the ethics of copywrite.
There are a lot of degrees of separation on this issue and larger ethical dilemmas beyond "I clicked the button, therefore it is mine!!!". The issue is far more complex than this letter addresses and it's obviously more emotionally charged than it is being logical in a legal, ethical and artistic discourse.