A game of two scarves

West Ham have made a bit of history by banning half and half scarves from the game against Spurs. I'm not sure they would cause too much trouble since wearing one marks you out as a tourist who doesn't support either side, though Mo Kudus might like one. Would any real fan ever wear one? Though should we ever play Millwall again it will be interesting to see how sales of those half and half scarves go...