I have no qualms whatsoever in chatting to other children who are "playing" with my DS. I will quite happily provide some boundaries if things are unpleasant - for all parties. I also don't care if I get glared at by people I don't know.

I also don't mind other parents talking to my DS, as long as it is done respectfully. Everyone has different comfort zones and I want to teach my son it's OK to stand up for his comfort zone, even if no-one else worries about it. Just as I want him to respect other people's comfort zones even when they don't match his. So long as no-one gets hurt or upset, respecting each others' wishes is a great thing.