That kid clearly didn't make that sign, most likely doesn't understand the sign, and has no idea what they're protesting. Seriously, if people are going to a protest, get a babysitter.
I think this is the type of tea party being referenced in the sign she's holding:
And I agree on leaving the little ones at home. Angry protesters can get violent, random criminals can start shooting (New Orleans last week) and really dense crowds of people
anywhere are dangerous because of the chance of crowd panic and stampeding. I've been to two rallies where panic surges occurred, and have witnessed bystanders being trampled.
