Quote - I don't see it that way at all. You upload it with no watermark which means it's a work in progress or you don't care about the copyright. Works in progress are always subject to critique or modification.

This is completely wrong.  There is no requirement that an image be watermarked in order for it to be protected. This is like saying just because I don't have a car alarm, I'm telling everyone it's okay to steal my car.

And works in progress are subject to modification...by the person who created them, not by any random passer-by.  Critique all you want, but don't take someone's image and make changes.  Surely you can see the difference?