The tactic is to have small business do it (Someone mention it before), this will lead into massive discrimination, small businesses being sued, thus creating the idea of the passport being good, it'll make them start begging for a legal way to refuse people entry into their business.

Also this will single highhandedly kill businesses, the moment someone ask you those invasive questions or brings it into the work place I'm expecting mass amounts of people leaving jobs, businesses losing huge amounts of income.