Lucas often refers to himself as a painter continuing his work on one piece of art for many years. I say, fine. Artists can show first draft on galleries, then work on it more etc... No problem.
But a painter does not sell his work to someone then few years later comes in the customer's house to take it off the wall to draw a mustache in the middle, then ask few dollars more or he'd leave with it.
It's not even a problem of an artist vs his fans; it's just something that you don't do if you're a well educated person and if you love art. Specialy when the artist is not the only person who worked on the "painting". It's a slap in the face of the people who worked on that "first draft" and help the "painter" to get a name, fame and money.
Man, I feel like I'm posting these thoughts for the 100th times. But really, the guy does not seems to understand.