I.
they're trying to forbid first-person shooters since Counterstrike was released.
you can still buy it in the shops so it will take ages to rate WoW 18+.

II.
even if they rate it 18+, nothing would change. The mother, father, brother, sister....
of someone would buy the game in the shop. Done. The rating of "adults only" is only
for selling it in the shops, not for creating accounts, paying the account etc etc...
so it wouldn't change anything here.