I'm getting a bit emoional reading this, as I never realised that some of the "anti-smackers" had, had such abusive experiences.
I would never smack my children if I were in such an angry violent state. If I get mad, I shout sometimes, but I don't smack them in anger.
I too was abused - by my Dad, he used to come into my room when I was sleeping, drag me out of bed while I was still half asleep, pull down my clothes and beat me and tell me not to make any noise. As a result I started to suffer fits when I went to bed, because I was so scared of going to sleep in case he came in and woke me. I was six, and I became really withdrawn and no, I haven't forgiven him and would never leave my children with now him as a result, unless forced to (has happend on two emergency occasions and I made sure someone else was there with him). To this day I've no idea why he beat me as it wasn't related to any incident as such - I think he just came home in an angry mood.
In complete contrast my Mum gave us the occasional slap on the back of the leg. As said earlier,it was when we were being very naughty and as a last resort and not often. It was always directly due to something we'd done and I never doubed for one minute that she didn't love us. Her smacks left a little sting but did work - we immediately stopped what we were doing (tearing around, throwing things or whatever) and I still find it laughable that anyone could seriously think that her little stings could damage us - physicaly or mentally.
I occassionally smack DS in exactly the same vein as my Mum, when he's being very naughty and after several warnings. I would never, ever do some of the things described below, which to me are plainly abuse.
I completely understand now why some of the other people on this thread are so vociferously anti-smacking. Your experiences and what you describe as "smacking" I would describe as abuse. However, I do think its important not to confuse the little sting administerd by a loving parent as one of a range of considered parenting techniques, with the cruel and abusive behaviour suffered by many children. In fact I think it belittles the children suffering real abuse, to deliberately confuse the two in order to try and form an arguement. It is also not a slippery slope; I would never abuse my children in that way; precisely because I know from first hand experience how much damage it can do.