Why would you as a Zoner bother about enforcing NFZ iRPly? No one pays you for it, you take extra risks.
I say - leave it to FP administration (official faction memebers).
EDTI: Moreover, we are starting to forget what NFZ is. Enforcing NFZ with fire is wrong. Making FR5 for violators is the right way. Because NFZ is meant to be a zone of neutrality, and this zone was made not for Zoners themselves, it is an exclusive right for everyone else to use it. If people are ignoring NFZ then they do not find it valuable and it must just be removed as it is and Zoner official's laws are to take its place whatever they could be. But this is what sovereignity is and this turns Zoners in an ordinary faction like anything else.