DDOS attack by user?

[Zlartibartfast]

Every time a user who i don't know joins a session username "KennyO" JamKazam freezes and crashes. They keep joining lots of sessions and leaving. Hopefully, this is just a bug and coincidence and not that someone is being malicious by purpose?

Can you block a user from connecting to you if you are not the host of a room?

It was not malicious. I do not know why that was happening today. Everything worked perfectly in a private session. I always test in a private session to make sure I am connected ok before joining open sessions. 

I was connected in sessions with other musicians earlier in the day. I have connected in sessions for months and everything worked fine.

I noticed this afternoon that when I joined open sessions that some (not all) other participants  showed 100% packet loss and looked like their sessions hung. I dropped out immediately. I tried coming back in a few times. I tried a few other sessions.

I have no explanation why that happened. But it was definitely not malicious.

I have had this same thing happen to me on a few occasions. Yesterday I was in a session with about 4 people that was going smoothly, then others started joining/leaving, and my client crashed.

I don't see how it would be possible for a user to cause this to happen; I think it's a software issue that remains to be solved.

In the future, I'll use RSVP sessions to limit the number of participants (unless I want to roll the dice with an open session).