Those aren’t extremists, they’re children. I’m not saying that as an insult, I mean it literally.
Actual, practicing anarchists are extremely bureaucratic. Ironically, anarchy in practice produces large, democratic governments that change slowly. Hilariously, a small republican government is best suited for making rapid progress. Note the lower case (d) and (r) - I’m referring to ideology, and not political parties.
Anarchists create institutions that reflect democratic values, and when everyone must be given a chance to have a say, meetings are huge and take for-fucking-ever (speaking from lived commune experience here). Cliques and factions form and work together to shut down proposals they don’t like. Its actually a very conservative ideology - nothing changes quickly.