yes I think its sensible to wear them to protect everyone. making it law just makes sense. because there will be some stupid folks out there that don’t think to wear them to protect themselves let alone others.
flouting and demonstrations and riots are evidence that people are already not thinking, as they are doing whats not meant to be yet. it will accelerate the spread not stop it. therefore if they cant control the public (or better yet the stars) with staying in sensible small groups, then why would you think they would be sensible to bother wearing masks without it being law?
some people will always follow the rules, do the sensible thing, take everyone and everything into account. but there will also always be idiots that just don’t give a crap about anyone, will take risks or cause issues no matter what. but some will not think initially but if its law they will take notice as they don’t want fined or sick.
if government showed a good example and the stars too, then maybe the public will follow suit.