I wasn't brought up in a violent household, neither was DP.. We were both smacked as kids but only as a last resort, which I think is how we disipline too.. (I don't have any live biological kids, but my partner has a son and I have been on the scene since he was 12 months old and yes I disipline him..) So I wouldn't have an issue with either my mum or DP's parents smacking.. I would trust if they did we would have done the same had we been there.. I don't think they would though anyway.. My mum lives interstate so I am sure her grankids would appear perfect as she would hardly see them and DP's parents are soft as!!