How old is she? What's the naughtiest thing she's ever done while you were looking after her?
She's one year old. The "naughtiest" thing she did was probably refuse to give me back an object I handed her when I held my hand out. A nice backhand to the face & she immediately dropped it however!
Note : clearly I am not serious.
She loves throwing stuff down off a great height (like a high-chair) in various directions & watching me pick it up. I don't consider this at all naughty & actually enjoy playing this game with her (I even keep score, anytime she throws it fast enough & at a angle I don't predict & it hits that ground she gets a point, if I manage to predict & catch it I get one.

(she's not being "bad", she's learning about gravity, if I was hitting her I'm not sure what she'd be learning)
You know, by equating spanking with physical assault, you are making a mockery of all the victims of domestic abuse.
That's like saying that calling grabbing a woman's ass in the supermarket line a sex crime nakes a mockery of those who've been raped.
If it's not physical assault (with intent to cause at least some unwanted physical pain as well as humiliation) what exactly is it?
Lots of children need smackings.
Lots of adults need smackings too. Just because they're children doesn't been they can be taken advantage of.
Very well put.
Tip to parents of "bad" children. If you have the urge to smack your kid smack yourself instead, because you're the #1 person the child learns behavior from (besides their mother maybe, hmm, that naturally leads to the next question - when is it ok to smack your wife?).