Indeed, it is your opinion, and indeeeeeed you are given access to this board to voice it. But need you be so overbearing and repetitive? If they don't get it once, mayhap they won't get it the second time as well?
It seems to me, that they aren't missing the point because of lack of intelligence, but rather that they saw your point and disregarded it, because they did not think similarly.
Now, I'll admit, I agree with your point about honor and all that. But facts are facts-if someone is in a mutual challenge and is an enemy of Mercinae, I tell them to leave, and give them time to do so. If they do not, I kill them.
They can be in that mutual challenge as long as they want...but as an enemy of Mercinae, they cannot be in my city, regardless of current actions.
So, for them to NOT be in an official mutual challenge, and then turn around and tell me toleave them be as they fight in my city, would be far beyond the bounds of my temper.
Fistandantilus
Written by my hand on the 16th of Eleuthral, in the year 1072.