why not just register then? there is an official statement. the thai government has officially said it must be done. whether some local offices require it or not shouldnt affect your ability to just do what the government has said you should do.no local office will refuse you registering.
well someday they will and then it may be too late. but if ignoring a law that hasn't been seriously enforced in the past but is beginning to be more and more feels good, go for it.
I guarantee the local police wont know what you are talking about. but they WILL sign off on the form if you ask them and then you have proof that you reported if immigration should ask for any reason.