I think the discussion about instinct is interesting! Bloss is right of course - in some situations violence is warrented. I would like to believe that I would never be violent towards another human being (as would Glitterfairy) however I do concede that were my family to be threatened then I would be more than capable!
The linkage between this and my position about smacking is that I do not believe that hitting my children is acceptable. And because I hold this deeply held belief, my instinct does not make me lash out at them any more than it would make me lash out at my DH or my DM or my work collegues. There just isn;t the brain connection that says 'hit the kids' no matter what the circumstances!
This of course makes no odds to Bloss's argument because her belief is that it is ok to smack. I think this is why this debate is going round in circles - because at the core of it our beliefs as to whether it is right or wrong are different. It is hard therefore to shift anyone from their position.