I don't know if a forum thread would count as a notice of a notice. Could anyone make a thread and would that make it one? I don't know your position in AMA guard14n, but for arguments sake, let's say you are a new player to AMA. Could you make a thread titled AMA vs BB and thus that is a notice?
Or what if one kingdom comes to ask another kingdom about a CF extension before their CF ends and that kingdom refuses. Is that a notice of a notice? Are they therefore deal breaking?
As for 2vs1 situations, AMA's actions and words seem to say 2vs1 is clearly acceptable. Pew Pew vs Strippers in Age 58 if you don't remember. There were also a number of posts from Elit saying the same thing during the ED vs Fratzia thing.