Wheelchair User's and Society's Paradigm
Lines communicate society's rules for parking.Biker has a lack of respect for this rule and violates it.
Wheelchair User communicates society's rule to the biker.
Biker communicates to wheelchair user to F$ck-off.
The Just Right Response for the wheelchair user is to now communicate with the police.
The police are in the most appropriate position to enforce the parking rule.
Society's parking rule doesn't apply to me, or to my motorcyle.
He communicates to the Wheelchair User his own rule of "Do not bother me with the rules of society" by using threatening language.
The threat implies use of violence to enforce the Biker's behavioral rules.
The Biker is a Violating Person who combines Disrespect, Threats, and Violence as a means to establish his own behavioral paradigm.
If the Biker moved his bike, then the Wheelchair User's would have engaged in both communication and enforcement of society's rule. If the police needed to be called, then he would have engaged in only communication, and the police would have engaged in enforcement.
Whether or not the Biker moves his bike is a direct function of his respect for society's rule and his respect for the wishes of the Wheelchair User.