I think it's stupid and trashy for most people to wear bikini tops when they're not at the beach, but whatever.

And about the shirt thing, I was allowed to walk around shirtless/half naked until I started getting nubs around 8. Then I was forever confined to shirtitude.

it's fine for kids to emulate adults, it's how they learn, but a parent has to be responsible for what their children emulate. If their child emulates whory behavior, the parent should act accordingly. Unless, of course, the parent doesn't find this behavior "wrong". Then they're probably just trashy people and there's nothing you can do about that.