In most legal systems contracts/transactions with minors are void to begin with and not enforcable. It's beyond me, why transactions beyond a limited monthly allowance are even possible, if the game is clearly aimed at minors.
The burden of checking age for each transaction should be with the seller, as it is enforced in retail. If the seller doesnt check for proof, then the transaction should be trivially refundable at least.
The burden of checking age for each transaction should be with the seller, as it is enforced in retail. If the seller doesnt check for proof, then the transaction should be trivially refundable at least.