> Is thee a time limit, say 1 year, after which they should let you shop again?

This implies a functioning government, and regulations.

Excluding is a decision made by each retailer individually, and the vast majority will not even have a policy for removing people from the list.

You could dynamically raise retail prices based on whether someone has bad credit, or is on one or more bad customers lists. Shouldn't the shoplifter be expected to pay extra for the risk that retailers willing to sell to them bear? Or you could just open stores that don't exclude with high prices and terrible quality products.

Yes, that's why Marks & Spencer in the UK operate the scheme and share the system with other major retailers in the UK. They are able to use the UK prevention and detection of crime exception to avoid data protection laws.

I presume that's who Store-Mart are, but there are others doing similar stuff.

e.g. https://www.askmehelpdesk.com/advice/t-455695.html http://www.urban75.com/Action/cctv.html

Forget shoplifting. This will be used to black list people for all sorts of reasons.

So what can you do to prevent it? I suppose you could shop strictly on Amazon, which could actually work.