I have some concerns about very young children, however genuine and spontaneous they may be, getting involved in this sort of political haranguing. I agree with much of what the child says but if it were a young child praising Theresa May, for example for her stance on immigration, I would feel there could be a perception that a child was being used as a propaganda tool.
However, I do think some of the comments here are getting a bit silly now, and also a bit worrying. How one goes from a little girl saying what she thinks to imagining her being viewed as a mini-dominatrix I can't imagine. As luckygirl said, there is loads of quite innocent footage featuring babies and children. In any case, children are seen in public all the time. If some very sick people see a little girl in a dress playing in a playground and find it arousing, does that mean little girls shouldn't wear dresses in public?