answer:It might be easier to prevent it by withholding a means of payment. Is someone else managing her finances? If she can’t enter a credit or debit card number or link PayPal to her bank account, isn’t she effectively blocked? On the other hand, if she can afford it, why not let her have a little shopping fun? Or at least give her a chance to show what she’ll do before they cut her off? Is what she does with her money any of their business?