Yes. But perhaps go further? > It should just be illegal to use customer data unless they explicitly agree. Should you be able to use customers data for any

Yes. But perhaps go further? > It should just be illegal to use customer data unless they explicitly agree. Should you be able to use customers data for any purpose whatsoever except in the delivery of goods and services that define your business? There are edge cases, of course. But it is not edge cases that matter. Giving permission is problematic. How do you know if you have genuine permission? Her in New Zealand I think (IANAL) that if the other side of a major contract (like a house purchase) does not get independent legal advice then it is very difficult to enforce the contract in any way other that buy/sell. Other conditions, idiosyncratic ones, cannot be enforced.