mitigate issues described in https://medium.com/@jonathan.leitschuh/zoom-zero-day-4-million-webcams-maybe-an-rce-just-get-them-to-visit-your-website-ac75c83f4ef5

zoom_protect.sh

#!/bin/bash

# turn off video by default
echo "disabling automatic video"
defaults write ~/Library/Preferences/us.zoom.config.plist ZDisableVideo 1

# turn off the zoom web server
echo "turn off the zoom webserver"
lsof -i :19421 | tail -1 | cut -f2 -d' ' | xargs kill -9

# prevent it from being added again
echo "prevent the zoom webserver from being re-added"
rm -r ~/.zoomus
touch ~/.zoomus