Are You Responsible If Someone Else in the Crowd Does Something Illegal?

Simply organising or attending a protest doesn't make you legally responsible for the independent unlawful actions of someone else in the crowd, unless there's specific evidence connecting you to that conduct (like directing or actively participating in it).

That said, being a visible organiser can draw more scrutiny in practice, even where liability legally shouldn't extend to you — which is exactly why documentation (who said what, who did what) matters if things escalate.

If you're an organiser, it's worth keeping a clear, calm public message about staying peaceful — not because you're legally obligated to control every individual, but because it strengthens your position if the protest is later mischaracterised.