Wait a minute -- doesn't it actually make sense to lump browser-embedded apps within the 17+ rating bracket? How else are parents who want to control things on their kid's device going to prevent undesirable surfing? Right now a parent can disable Safari and disable downloading content above a certain rating, thus preventing using the device to browse in any way. If Apple lets apps with open browsing have ratings of less than 17+ then that breaks things for parents who want this kind of control.

Note that this is not an argument about whether parents _should_ do things like this. I personally believe it's up to each parent to decide how to parent their children. But since there are already parental controls this is more of an argument for not breaking them or making them ineffectual. (Or at least ineffectual without a lot of work on the part of the kid.)