If that would be the case then No I would not post a song on the internet for all to use. I would put a patent of some kind on it so it couldn't be stolen. A picture on the internet is for all to use. Maybe not in the sense but it can be. Songs and books are different. Those come from the mind and if they are intended for profit then they must be done so that it is published with an author so nobody can take credit for it.