I do not consider it acceptable for a jurisdiction to allow entities in it to evade the responsibility I believe they have to be accountable for public resource fragments assigned to them. The LIR holding the address space *is* visible.
What good does that do? None of the LIRs do anything of use about broken contact information as far as I can see; the most I've seen anyone do is ARIN putting in a little note about "we know this contact information is broken, but we're going to let this address space go on being used by someone not even we can contact anyway". (I'm paraphrasing rather loosely, of course.)
So if one of their customers is doing bad things, you know whom to talk to - and if necessary, sends the feds to.
Actually, no, because the jurisdiction the LIR is in is not necessarily that of the end user. For example, I, in Canada, have address space whose LIR is ARIN, in the US. Or is this for values of "LIR" that include all entities who reassign their allocated address space?
If the LIR is "careless" - well, in that case mandatory end-user registrations aren't going to be very useful either.
Ultimately - if the IANA actually bothered to enforce them - they would get a sloppy LIR decommissioned, or at least its own assignemnts revoked, which amounts ot the same thing in practice. (Of course, this would be a last-resort action; presumably the IANA would take other measures first, but, ultimately, it's what would have to be done with a persistently uncooperative LIR....) /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse@rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B