Whitetron, I think the fact that this site and expressobeans exist are reasons to believe that it's being taken at least one iota more seriously. I hear in the old days of GP people actually talked about serious stuff, and worthless d-bags like Mayer didn't even exist.
I don't necessarily think that there are "rules" per se, but when things start garnering enough attention to where there are cultish followings, web sites and even archival activities (ExBeans is active in pricing practices and also maintains that the site exists for archival purposes), people pay more attention.
Hell, talk to Rene. He's had some ideas that make me think HARD.
["this poster would be gone from the world 10 seconds after the show was done.."
this is a point I think alot of comments on this website miss]
Ok, fair enough. GP sees a lot of stuff that the whole world would have missed otherwise. That would have gone unnoticed anyway. It highlights stuff that doesn't really get seen after a certain point.
But think of how much "fine art" is that as well. Not necessarily appropriation of the "non-artistic," as seen in Duchamp's readymades, but rather the discovering of small-scale artists by people with money or a big name, people who promote these smaller scale people into something bigger.