PART 1
by adding in Preferences such as adding a 3rd tick box while the 1st tick box would be unlock the 2nd and 3rd tick box while the 2nd box be store and 3rd be community
and the 1st tick box would require the password in PART 3
PART 2
if adult content etc. was enabled it would then send a message to that users email but if that user has Parental Control settings enabled then it would send it to the parents account instead because it would increase the chance of their parents finding out and so it would encourage parents to have the Parental Control enabled and some children would have their own email so they would delete it instead but if it was sent to the parents email instead then it should lower the chance of their children from stopping their parents from finding out
PART 3
and it would send a automated message at least once from 1 month or up to 1 year and it would depend on when its possible to allow adult content to be back on the store but it would need some extra security to make sure it isn't fake to steal info such as sending a one time use password that is random every time
PART 4
while this might not be as good as ID but it allows more freedom and it helps or gets some parents to do their job while keeping the rights of adults to buy any kind of mature games such as violent games to adult games
and if its in the rules and make it simple for people to see the rules by placing it in the top left corner in the section called view by adding one in there called rules
PART 5
some problems with the credit card and ID verification is that it takes our freedom and it would increase the chance of hackers stealing or leaking our private info