My point in citing Jim's example is that just because it's difficult to enforce a rule is not a reason to change the rule and condone the activity. It should be, and is, against USATF/RRTC policy to change a certified course map in any way: a name change, a change to the start/finish description, a change to the path of the course. Just because it is difficult to stop people from doing it, is not a reason to eliminate the policy.
Regarding RDs changing the name of a course on a certification map, if the original RD who paid to have the course measured and certified doesn't care, or even encourages as in Jim's case, other RDs changing the name at the top of the map, then it certainly does seem to fall into the category of victimless crime. But if the original RD does not want others "stealing" their certification, it's not a victimless crime, and I definitely don't think USATF/RRTC should condone the practice.
Regarding how to stop it, the few times that it has come up in Michigan I sent an email to the RD telling them they are breaking USATF/RRTC policy and asking them to take it off their website. If they ignore me they ignore me, but so far the races have removed it.