Well, I think about this topic a lot and I have to say that copyright isn't the only issue here. There is the whole evil triangle of copyright - attribution - plagiarism. What makes this evil is that sometimes you want to protect information and lock it away for reasons other than control or money which is at odds with transmitting or preserving information.
Attribution is a valid reason to lock up information or at least "tag it in the wild" so that it retains its value over time. Who wants every woo-woo's paper to have the same weight as a Nobel laureate because people can just change the names on stuff? Omission of attribution is bad enough, but eliminating ownership divorces author from idea. Oddly the reverse would also be true. Sometimes "Anonymous" authors want to say something that cannot be backtracked to them. Image the damage if a whistle-blower piece was tagged back on to a half dozen "authors" because we did away with the convention of attribution?
Plagiarism is the other side of that, people will always steal "ideas" and if it is done enough there is no way to "authenticate" or "value" either the idea or the original author. I hate it when people call plagiarism "theft"; it is more like taking someone else credentials and wrecking them. It is its own thing, but trashing credentials or devaluing work is more correct than "theft".
Copyright has a twist on it that most people miss. Yes, it locks up ideas for a period of time but it also protects unpublished information essentially forever. Until the Fawkes Guys and Gals break into Coca-Cola, Pepsi and KFC the formulas for these products are safe from the public. That is one of the protections of copyright that most people overlook. Unpublished information can be "discovered" by others (except by theft, which is of course illegal). What protects Coca-Cola also protects your bank statements.
I would lean heavily to the idea that all three of these things are in serious trouble due to the Internet and maybe a rethink on all of them are in order. Throwing them completely away would be foolish.
Solfe
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'That was tops! Who's not good at math? I was all, "Four!"' - Finn, Adventure Time.