Oh yeah.
oceanperch---the peaceniks lose their kids a LOT. I have seen three of the Wshington DC ANSWER rallies on C-Span, and each one has been interrupted by "missing child" announcements at least three times.
But those were huge crowds, and this was a tiny one.
I guess when these people get together to bloviate about their anger and bitterness, they tend to lose track of anything extraneous to that, like their children...
Disclaimer: it's also possible that the kid got bored and disobeyed his mom by biking further than he was allowed, and by the time he got back they were elsewhere looking for him. In fact I think ALL the missing kids at these things went missing because they were bored out of their skulls. If a child can't sit through a one-hour church service or a two-hour movie, how are they going to handle a three-hour rally full of very loud and unhappy people?