Protesting during screenings

So I saw Oh Canada in ATH at 12:45pm today and it was interrupted by two protestors who got on the stage which angered quite a lot of unamused people. It was really jarring to hear an 80 year old woman next to me lean forward and yell “F*CK OFF!!!!”

Is this a common thing at the festival this year? And do these protestors buy tickets like the rest of us and just wait until halfway through the film to jump up and make a scene? I was quite surprised at how long it took for security to show up and remove them. They were up there for at least three or four minutes, and I still have no idea what they were protesting about. Something about a dead planet?

I’m also unsure as to why they chose a film screening as an opportunity to protest about the planet. Is this what we have to look forward to tomorrow?