Yeah so this is maybe something to keep in mind:
Last year security researchers told TechCrunch that malicious users could access and listen in to Zoom and Webex video meetings by cycling through different permutations of meeting IDs in bulk. The researchers said the flaw worked because many meetings were not protected by a passcode.
Lawyers, if you’re doing some confidential clients stuff over a Zoom meeting, use a passcode. Teachers with young students, also, maybe think about a passcode.
Heck, use a passcode just to keep your stuff private, or at the very least be ready to boot anyone who doesn’t belong from the participant lists, or lock it once everyone is in the meeting.
Zoom and other online meeting spaces are great, but like any other meeting space, it’s only as private as your ability to keep other people out. Don’t sit on a park bench and hope no one see you. Close the room.