Investigating supermarkets' two-tier pricing

The UK is proposing to investigate supermarkets' practice of charging more to customers that won't help track them.

Instead of investigating them, the right thing to do is prohibit stores from charging more if they don't identify themselves.

The article cites "defenses" for stores "right" to pressure people to help stores track them, but those are irrelevant because tracking people is doing wrong to them. Buying anonymously does not do wrong to a seller; it is everyone's right.