I think the whole green and white thing sux, frankly. However, I do think there should be some restrictions. There are shoots in the US (perhaps not NAA/FITA shoots) where people show up in cut-off jean shorts, torn t-shirts and bikini tops. Great for a picnic, the beach, the bedroon, but not on the shooting line.
I think team shirts (
AIUK included) in any colour are a good idea. It still gives an air of dress code, but we should be able to wear what we like on the bottom (within reason) as long as it's clean -- khakis, cargos (no camo), just above knee-length skirts, skorts or shorts, even jeans.