» Doug Whitfield:

“[...] Password: kazoo (although I am not sure this actually works...I think maybe the first one in the room can set a password and then if you leave the password is gone. It seems weird). [...]”

I can't remember where I read it, but meeting rooms dissapear as soon as the last person leaves the meeting, and so do passwords (https://jitsi.github.io/handbook/docs/faq#i-set-the-password-in-meeting-but-it-is-not-working-the-next-time)`so room name is avaliable for anyone to use it. That's why it's important to use a strong room name (https://jitsi.org/security/)