Recommend modify the policy of minor act. for most of developed countries

Modify the protection of minor act.
Detailed rules and regulations:
1 The age of adult,in all of developed countries will be 18 years of age.(Include any field)
2 Revoke many protection provisions for minors over 16 years of age.
3 If the person is not student,and over 16 under 18 years of age, can't be applid protection of minor act. (Except family responsibilities in protection of minors act.)
4 If the person is over 16 years of age,must bear full legal liability,can be applied death penalty.
5 A person can drink wine or smoke,must over 16 years of age.
6 About the restricted of movie,TV drama program,other television program,any publications and etc.,the highest restricted is 16 years of age.
7 Have the right to vote and stand for election,the age will be 24 years of age in future.
8 In USA, the age of when can apply gun license will be modified.
Unchanged policy:
The age of full capacity for civil conduct,is 18 years of age.
Can get the driving license of car
etc.