I wholeheartedly agree. The outward means to identify a member of a gang or a criminal group one belongs to should be banned.
I suggest we start with the most recognisable of all, the one which most males emulate if they want to “get ahead” in the world or if they want to pretend to be a successful and accepted member of our ruling elite , the uniform of the biggest robber class in the world: The suit our criminal, corrupt and extreme leaders wear and whom all of us are slowly learning to recognise for what they truly are: Modern day robber barons, feudal lords, terrorist leaders. Let me give you a few examples.
And the latest and greatest in Gang colours, a bullet proof version as worn by the Gang leader in chief: