If you perform civil disobedience you can and probably will get arrested. It happens all the time.

Choosing to break an unjust law doesn't mean that a judge will understand the injustice of it and let you go free, nor is there any assurance that jury would acquit you. That's what I mean when I say "there's no negotiation"

Once a police officers decides to arrest you all negotiations have ceased and they may do whatever the law tells them to, or whatever the law lets them get away with, or perhaps a bit more.