So it feels a bit weird.
Yesterday 9yo DD cut her own hair (My DC are well aware they are not allowed to cut their own hair!). It's on the underneath only, so you can't see it unless her hair is tied up. She's generally being a bit rude recently and her response was "Well, it's not my fault if you don't like it". 
I went back in to her bedroom last night to give her a last kiss, and she was chewing HubbaBubba. She knows not to eat anything after she's brushed her teeth. She claims she found a packet on street, but I suspect a girl who lives in our cul-de-sac gave it to her.
So I told DD she can't go to a fireworks display with friends (nothing had been firmed with friends, I'd told them I would confirm, but DD doesn't know that).
My DC are normally reasonably well behaved, and if they aren't I explain what they have done wrong rant at them. DH and I are pretty strict and there are consequences or example, if DC don't come home on time, they aren't allowed out so late next time. But I feel this is more of a punishment then a consequence.
Just wondering what other people would have done...