Here is how I see it:
* Disabled parking spaces--a legal issue
* Spaces reserved for curbside pickup, compacts only, EVs only, etc.--a property-rights issue
* Traffic control (stop signs, etc.) wholly internal to the parking lot (if in a jurisdiction where it has no legal force)--a property-rights issue
I generally try to follow the law, though I admit to a degree of prioritization when the public-interest justification for the law is especially compelling (as it arguably is for disabled parking spaces). Where property rights are concerned, at a conceptual level I consider that there is a bit more room for negotiation, but I do not want ever to be in the position of being asked to cure trespass, and a fundamental principle of defensive driving is to remain aware of the collateral effect of your own rule violations, even if seemingly minor, on other drivers' behavior.