To be clear, I use the term “anarkiddies” to distinguish them from serious anarchists. The former display the same empty and ineffective attention-seeking mentality as the idiot in this video but I agree there’s no connection I can see in this “protest” to any expression of anarchist ideology.
One of the positive developments I’ve seen in the last decade in the anarchist/libertarian-socialist movement is educated and experienced activists like yourself curtailing stupid and counter-productive tactics in favour of mutual aid and mutual self-defense and effective and targetted direct action. The leaders and funders of the climate emergency movement could take a lesson.
It’s reasonable to work on the assumption that a violent and attention-seeking clown is a police agent and tell him to go home, even if it turns out he’s just a thirsty idiot. Either way there’s no damage done to the main demo.