Acceptability isn't usually a binary. Legality is the cutoff point at which we decide you should be punished for unacceptable behaviour, but it's perfectly possible for behaviour to be both unacceptable but legal.

Consider: - Cutting your grass at 8am when your neighbour works nights.

- A well off person putting their child up for adoption because they don't want the hassle.

- Payday loans given to people you know won't be able to pay them off, ensuring they pay you far more than the value of the loan.

- Banks processing payments out of order to trigger overdraft fees that would otherwise not have been collected.