So which of the following obstacles should Google place as a sign-up barrier in front of every new user on any of its services? http://en.wikipedia.org/wiki/Ch

So which of the following obstacles should Google place as a sign-up barrier in front of every new user on any of its services? http://en.wikipedia.org/wiki/Children%27s_Online_Privacy_Protection_Act#Complying http://en.wikipedia.org/wiki/Children%27s_Online_Privacy_Pro...