It's been good to catch up with this discussion. I think some very interesting points have been raised.
Jj, I found your message really constructive. I will remember your experience when my youngest son starts nursery. I especially liked the 'use your words' suggestion, when behaviour threatens to get aggressive and out-of-control. Having a 'do' rather than just a list of 'don'ts' and 'no's' when telling off my son is by far the most effective way to get him to change his behaviour. It gives him something exact to aim for, as I found out through trial and error.
To add to the general diacussion on why some parents appear to not tell off their child enough about some anti-social act, can I just add one thought? When I control/tell off my son there are two sorts of telling off. Firstly immediate words and action. eg saying 'stop it now'/ holding him/ removing him from the situation etc. This is done in public and hopefully goes far enough to calm the wronged child and/or parent. But it may not have much long term effect on my son, by itself.
Secondly, more considered words and action. This is done in private because it takes much longer, and I want my son to really open up. It also has to be done when he's calm and when I've had time to gather my thoughts. I'll want to hear my son's side of the story, ask him why he did what he did. I'll explain why I'm punishing him eg removing a favourite toy for a while, and agree with him a realistic and 'good' way of him behaving in a similar situation it it happens again. Or remind him of a previous discussion on this if it's happened before. I suppose I started to do this when he was three or so, obviously in a simplified way.
What I'm saying is that for me at least, lots of behavour control goes on in private. And some of it is a private matter. I'm trying to build my son's trust in me. I don't want to force him into a theoretical corner and so encourage him to lie his way out.
So if I sometimes appear stangely calm and detached when dealing with a naughty child in public, it may well be becasue I am already thinking how best to tackle the situation with them in private.
While this discussion has higlighted to me how important it is to tell the other parents what measures you are taking to encourage good behaviour in your child, the real nitty gritty of behaviour control is sometimes a private matter.
Got to go now, may add more soon.......