I was smacked and it never done me any harm, although now i tend not to resort to smacking, i use a naughty mat and when ever any of my three are mouthy, rude or hit each other they spend how ever old they are in minute, however i tend now to just use this method on my youngest who is 6, my older two who are 8 and 11 i take away privledges, my oldest loves Eastends and at the moment in fact he is banned from watching it for a week and he hates it when i ban him, i have smacked him in past and i can say from comparison the taking away privledges works better by far.