No I have no issues with other people disiplining my children. Within reason of course, and within the bounds of my own disipline techniques. I have a few friends who are comfortable enough to disipline my children, and vice versa. We all have very similar parenting styles. My family (my mum, brother, SIL) also have similar values ect so again Ihave no problems about it.

And I agree that the children learn alot more from getting disiplined by people other than parents. Besides that, if we are in their home, or the behaviour is affecting them or their child while we are int heir company, my children need to learn those limits, and that it's not ok.

But I would NEVER let another person smack my children. I really try not to do it, and very rarely do it, and would not condone another person smacking them or reacting to them in any kind of aggressive or violent manner.