Conjecture handled at-con kids pretty well, possibly because four of the kids they were taking care of belonged to committee members/helpers :)
I don't think I have too many problems with kids at cons in general, but of course the con has to adapt a bit to cater for them.

... I want to say something insightful here about how it's not healthy for society in general to think that kids should be bundled out of sight for most of the time and not interfere with this all-important "adult business", but I'm too tired. Maybe later :)