level down the actions you described to the intellect of the average smart phone user.

I'm not being sarcastic. the average smart phone user have been dumbed down by corporations so they don't even need to add technical walls to their walled garden, as to avoid regulation. if google don't prevent you from installing apks, they will never face the court decision apple just received. but users won't act in a way they lose their 30pct fee either.