block particular apps for info privacy/parental control

Could anyone provide me with a link to request that: blocking or locking (via password) individual apps be a feature that Apple developers integrate into their new software updates?

Reasons:

1) Protecting info privacy when letting others use the device.

2) Preventing access to apps that include unfiltered access to the internet via built-in browsers, even when Safari is disabled. Examples include Google and Bing search which are rated only 4+

3) Apple's current Restrictions features are decent, but put blanket restrictions on many legitimately good apps when the appstore is disabled. Makes functionality of any iDevice very limited.

I know I'm not the only one requesting these features, and the only solutions I see on the web are jailbreaking the device, but I do not see that as an option.

I see the people at the following 3rd-party organization developing such an app, but shouldn't this be a native feature provided by Apple? http://www.appcertain.com/

Any help would be appreciated, thanks!