You could go back a few years and find some different schemes that were used on the more modern bodies, just not 2011s. The top teams, stay the same but there are others out there. I do agree with not wanting to run with 6 Red Ferrari's and 4 silver McLaren's, but you still have the Renault team that has switched up colors several times over the last 6 or so years. And other teams that may or may not be around today.
Rules may be a tad strict, I'm for realism within reason. Keep it looking at least possible, and not an Easter egg. Every body has opinions, that's just mine. Hell, I have a black Ferrari, and a yellow one. I like different twists to the same old story. To each his own.