They broke their Promise,
They clearly promised us that they would not .... sign in ANY strat battle against us
Fairly sure that's not the case...
Anyways, forbidding people from taking part in strat battles/threatening consequences if they do is a bit of a dick move and goes against the basic idea that strat is a GAME where people can ENJOY large scale battles.
Say what you will about the castle switch, the night time crap, etc etc, the three SoA who fought in that battle had NOTHING to do with that and were only trying to have fun, on a battle game, by fighting in a battle. Trying to control people and who they can and can't fight for to such an extent is utterly ridiculous and most sensible people on these forums would agree to that.
Furthermore, anyone, (regardless of which clan or side of these alliances they are on) who thinks that players playing on one side in a battle means a horrible insult, an act of war, or in anyway takes it personally, needs to chill the fuck out and remember that there are some players here who just want to be a part of big fun battles.
TLDR : Anyone who tries to control the side people sign for/gets pissy about it, is a moron.