This is very true and even worse for mobile games! These young kids all have their own phones already nowadays. And its way too easy to buy PSN Store cards or other gift cards at the store and use them on those games! They don't even need their parents credit card anymore! This issue should definitely be addressed!
On the other hand parents are giving their kids phones/consoles way too early these days without even monitoring what they are doing with it! 12 year olds shouldn't be playing games like GTA5 after all...