By allowing people to shoot themselves in the foot after ignoring a unmistakable warning, you are helping teach the foolish to be more careful in the future. Making mistakes is the best way to learn something.
If they even notice, that is. It's just as possible that they play open relay for a year before they move to a new phone because their battery is always dying so fast for some unknown reason.
What reason do you have to believe that this goal wasn't achieved?