Sorry, what? They have the right to unionize. The whole issue at hand is that the employee put a notice of that legal right into an employer tool. What rights do these people not have that you're thinking of?

Look, the point here is that if you want to win a unionization fight (which is a legal victory, it will happen in courts and with contracts) you have to fight using legal tools. Pulling anarchist tricks like this just makes you feel better, it does nothing but make management's position stronger.

I mean sure, my comment was far too pompous, but calling this anarchism is silly.

If we leave rhetoric aside, what she's done is the equivalent of sending a leaflet or putting up a poster on company property. That's not strictly 'proper', but life does not happen in courtrooms. You actually have talk to people, let them know what's happening, organise, etc. Courtroom is where the fight is settled in it's last stages.