[chongli]

I think what likely happened is that the zoom call was started by a non-technical person who didn’t realize how to properly configure the permissions on the meeting. So once the meeting got started it turned out anyone had permission to share their screen and hijack the call with whatever they wanted to show.

[acomjean]

I use zoom for a couple groups I'm park of. It's actually hard to set screen sharing on by default. To the point where if I use the link I sent out to join not as the meeting organizer, I have to leave and come back before anyone can share. My work zoom link gets around this restriction..

The fact that zoom full screens any share makes this worse.

At this point most organizations should have someone adept enough to boot misbehavior. It's a little tricky.