This issue is much bigger than enforcement. It involves access to businesses, both by cyclists who don't want to lock their bike a quarter mile away, as well as others who may be impeded (endangered?) by bikes locked to convenient objects. It involves the quality and location of racks provided by the city. It also involves the behavior of other cyclists - I certainly don't want my rack parked bike dinged up by some other careless cyclist. Did Charleston really reach out to gain insight to all of these factors before they enacted this ordinance?
For the record, my libertarian tendencies put me absolutely opposed to this ordinance - to the point of wanting to flaunt it. The thing that bugs me is all the whining about not knowing (or expecting enforcement). It happened - get over it.