Agree. Althought it's a standard feature in FireBird BBS system which is almost the only BBS system in chinese BBS world. I don't think it's a good idea to show guest's IP address on Rolia.
On the one hand, it hurts the appearance of Rolia. It makes the page ugly. On the other hand, it hurts most guest's feeling about Rolia. I don't think it's a good idea to replace one kind of hurt by another.