There's media professionals and legal counsel on the ground advising.

They run their nightly tug at heartstrings 'peaceful protester' content to blanket on social media the following day and set up gofundme campaigns.

Then the film crew goes home and the Bane's riot crew clocks in for the night of violence in Gotham. Going to work with blunted attacks to try and bait a reaction useful for film. They're looking for their holy martyr moment to point and say "See! Normies come join us. We're the good guys."

I think the Mayor will be fine. They'll use the filmed content for a laugh.