Does Mandos have jurisdiction over men?

[Galorme]

Hobbits are a branch of Men, as are the Puklemen (sp?, the dunadan but i believe that is so badly spelt it will be unrecognisable). See the Prefix to the FoTR.

He was simply desguised in human form and this would no more stop him from stepping onto the immortal lands than it would make him subject to any of the other faults men are subject to.

He was not disguised at all. He was put in the body of a man, specifically created for him by Eru. He was subject to age, though it was very slow, he had to eat, and he could be destroyed easily (well relativley). He is subject to misfortune etc. He is a Maia in Man Form, not merely a Maia projecting an Image of Man.