http://g7ejphhubv5idbbu3hb3wawrs5adw7tkx7yjabnf65xtzztgg4hcsqqd.onion/html/defcon-16/dc-16-faq.html
A: People have brought children to DEFCON - it is not recommended to do
this unless you are going to constantly supervise them. It is generally
an ‘adult’ atmosphere (language, booze, et cetera). If you've never been
to DEFCON, you may want to refrain from bringing your children (unless
they are demanding that you bring them).