My problem with this that its incredibly stupid. If evefybody was to support their local team, Englands biggest club would be Bromley Town. Not Manchester United.
There are some genuine football crazy fans who for reasons which are no fault of their own. If some malaysians love arsenal, then let them, they provide money to your broke ass club. If people in london support real madrid, then whats the problem.
Some people need to get off your high horses and realise who keeps your club financed.