There is nothing wrong with Cliff's store front:
https://www.kleinbottle.comThe problem is in Amazon's storefront, and there millions of sellers are operating in the same space, so doing some due diligence is required. If Cliff could just seize ownership of his storefront from a thief, why couldn't a thief seize it from Cliff? The solution is to register a proper trademark.
Like it or not, the world is messy, and it costs to keep it clean. Registering a trademark is like buying locks for your home and vehicle, and buying soap to wash your clothes, and changing the oils in your machines.