I’m a new user of meet.jitsi. I created an unsecured room and prior to sharing the link to the room, I had the room sitting open on my laptop. I was doing some other chores when I noticed some unknown “Jitsi Fellow” had joined the session (no video or audio). They hung around for 30 seconds then disconnected.
How is this possible? Given that my room name was 3 random dictionary words, it seems unlikely for someone to guess.