Well with breach of the piece. As you will see in the code it lists the powers to write codes for breach of piece under RSMo 79.450 which says.
#7 The board of aldermen may enact or make all ordinances, rules and regulations, not inconsistent with the laws of the state, expedient for maintaining the peace, good government and welfare of the city and its trade and commerce.
Which plainly says to me the laws must be consistent with state law. and the Crestwood even references state law (RSMo 574.010) in the ordinance. And it says.
574.010. 1. A person commits the crime of peace disturbance if:
(1) He unreasonably and knowingly disturbs or alarms another person or persons by:
(a) Loud noise; or
(b) Offensive language addressed in a face-to-face manner to a specific individual and uttered under circumstances which are likely to produce an immediate violent response from a reasonable recipient; or
(c) Threatening to commit a felonious act against any person under circumstances which are likely to cause a reasonable person to fear that such threat may be carried out; or
(d) Fighting; or
(e) Creating a noxious and offensive odor;
(2) He is in a public place or on private property of another without consent and purposely causes inconvenience to another person or persons by unreasonably and physically obstructing:
(a) Vehicular or pedestrian traffic; or
(b) The free ingress or egress to or from a public or private place.
2. Peace disturbance is a class B misdemeanor upon the first conviction. Upon a second or subsequent conviction, peace disturbance is a class A misdemeanor. Upon a third or subsequent conviction, a person shall be sentenced to pay a fine of no less than one thousand dollars and no more than five thousand dollars.
I see no way that OC falls under this. If a LEO comes in threating to write a ticket on this if I do not go away. I will go, but I will guaranty he will have an Officer complaint letter for harassment in his file. If he pulls this with a large group he may just get a stack of them. and believe it or not. Those complaints mean something to his career.