hehe... I'm not more evil then somebody sending a fullgrown horse into a crowd of people

.
But really, if I wanted the group to split up, or characters to be removed from the game, I would've had the guards arrest Percy and however else in my update.
this is simply a rather difficult encounter, and something that you'll have to deal with if you have CN characters in your game. Sometimes their rashness goes the good way, in this case it goes bad.
But I must say that I am pleased with what is happening, and I like all the characters in play and how they act. Like Ayrn said: good characer development and interaction is part of our fun in roleplaying. I didn't mean to scare people off, and so I'm going to add here that things may not be as bad as they seem.
In any case, I'm just curious to see how things are going to develop from here.