To be honest, I don't think anyone should be "Critiquing" anyone's gallery images unless they specifically ask for it, but that's just me and I don't post much to the galleries anymore. I mean seriously, do you go to real brick and mortar art galleries to "Critique" the art or do you go to "Appreciate" it? I think for most people, it's the latter of the two.

I'm certain that you don't go to a brick and mortar art gallery with a pad of postit notes and start sticking your opinion under each and every photo, painting or sculpture in the gallery. If you did, you'd soon find yourself hauled out of the gallery by the curator!

And as good of an idea as yours is Ryus, I don't think it would really help the situation much. People don't use the existing flags appropriately now.