Imagine a gun range that was well aware that their grounds were being used in nefarious ways. We'd shut it down. A hospital that just blindly gave out pain killers to anyone that asked. We'd shut it down.
Does this mean that a zero tolerance policy is what should be used to shut things down? I don't think so. We have some agency to control things, though.
We cannot expect every parent to be able to protect their children when they are being predated on by dozens of multi-million dollar companies, and the state is on the side of the companies.
Those kids shouldn't even have a mobile device to play said game. That's where the parents can, and should, make a difference: don't let your kid even have a smartphone in the first place.
And the reason we have these ads is that corporations are hoping that the kids will indeed disobey, and whine constantly at their parents, until they have their way (as directed to by the targeted ad). There was a good reason why targeting kids in ads used to be illegal in Europe.
The parents' job is to say no. If they're letting themselves be influenced too, that's bad parenting.