Erin, no I don't think you're being over the top! I see the same thing happen all the time in playgroup, etc. My family are actually quite good and will always ask me first. In playgroup, we tend to have healthy food like cut fruit so I don't mind if the other mums give DS that. On occasion, people offer him biscuits and sweets and I just stop them and say no. It bothers me more that DS is a seagull and if there's food, he'll be there at your feet! So people automatically give him what they are eating, so I'm always watching and butting in if I don't agree with it.