Facebook knowingly charged parents credit cards when children unwittingly purchased in-game microtransactions, then refused to refund the money.

https://gizmodo.com/report-facebook-knew-its-games-were-taking-money-from-1831866407

#SecurityHygiene tip: think very carefully about where you allow your credit card data to be saved. Not all vendors are PCI compliant, and others can easily be manipulated by a trusted 3rd party (like your child).