So how resistant could IRC be to chat control? Lets say we use SSL as well as authentication.

I assume they would come after whoever is managing the server as its not end to end encrypted?

If the server runs outside their jurisdiction (and not in a friendly one) then they would probably just block the dns / IPs like they do with video streaming?

most irc networks have many linked servers so that gives a range of operating ips. i think if even they blanket blocked, performming a netsplit on ops to takeover (if not chanserv etc) or disable channels is probably easier