Here's my theory about why you never see the police cite those flouting the ordinance prohibiting bike riding on sidewalks in downtown Spokane.
Sure, the cops are busy with other things. But I think the real reason they don't spend time on this is the fact that they know not one of the offenders would or could pay a fine.
To be fair, many of these law-breakers might not be aware that they are in violation of the municipal code. I say that because I would further speculate that many of them couldn't name the president of the United States.