I was not endorsing anything. My intent was to tell an interesting anecdote that illustrated the complexity of rights. Sorry for the confusion.

My personal attitude (not endorsing it, though!) is that the artists are the only people who really count. That's why I contacted them for permission. Beyond the artists, everything is just legalisms and how seriously to take their desires is a legal consideration, not an ethical one. My anecdote does indicate this in action pretty clearly, but it conflates that attitude with the main point I was making (that this stuff isn't simple).