Branding. Product branding.
If you carry the mark of the 'beast' you are in league with the 'beast'. That makes you a collaborator and we all know what happens to collaborators don't we. Some things are just deal breakers.
Put a fluffy kitty on your shield and we CAN negotiate, unless you are screaming at me and acting all 'stabby' with your sword.
You will find if you read our handbook that we are pretty upfront with what will and will not provoke a violent response.
Stupid skeletons.
http://samuraifrog.tumblr.com/
