There's nothing reckless about handing a child their favorite game to play.
Once you've been bit with a $100 charge for an in app purchase, you start to question the true utility of the password timeout. 5 minutes ago I downloaded the game on a new device for my child to play. Now they have unfettered access to my credit card account because I just downloaded the game.
Blaming the parent for being "reckless" in this scenario is little unfair. Being a parent is extremely difficult. It requires a lot of patience, thought, and understanding.
In app purchases love to trick the end user into accidental buying. What better demographic than the child who just received the car with the keys in the ignition?
As a parent who's recklessly had this happen to them, I facepalmed and sucked up the extra charges. Mea Culpa, but it does irk me that it's so damn easy to do.