Also just because there is a law doesn't mean there are consequences codified, and this is most true regarding states laws that “require” an LLC registered in their state. Remember that states are in competition for business, there are hurdles for them to do annoying things. The best example I’ve seen in one state is that a local LLC branch is required after your foreign LLC gets sued, and the limited liability is active and retroactively applied at that point in time. But hey maybe your anonymous LLC deters people from suing to begin with.

(This is different than there being a law codified and not being enforced)