Not a mod
But yes, I do the LotRO stuff on the LotRO Stratics Site.
Any players using historical (Tolkien) names or close variations there-of, will find themselves getting their name changed to something else by a Game Master, if you're able to get it past their filters.
LotRO actually has a very smart naming filter. One of the things is too many vowels and it will block it, so you'll never see someone running around named "IIIIIIIEEEEEEEEOOOO" and stuff like that.
Names are strict in LotRO and must adhere and be along the Guidelines given when creating a character. I just built some pages on the Races that shows all the naming Guidelines. Now, don't take the guidelines too literal. You may have a dwarf who has an elvish type name, and vice versa. Just don't expect to last long with names like "KoRn" and "A Real Pimp" as well as names from historical figures in our Real World either, like Lincoln or Hitler, ect.
The Game Masters are quick to act upon names that do not befit the world of Middle-Earth or are clo9se facsimiles of historical Tolkien characters. Players are also quick to page on such players. I have bore witness to many many names being changed right before my eyes.
I saw on guy with the name of Mithrainduer (You know, a likeness of Gandalf's true name), get changed to something like Mythrader. (not exact but a close example for my memory)
Go to
http://lotro.stratics.com and under "Character Knowledge" section, take a look at each of the Four Races there to see LotRO's naming "Guidelines".
The reason for such strictness is that the Game is like the Story, but Playable. It continues down the Storyline, following the Lore so close it is like Tolkien is here creating the world around us while we play. The events and Books continue to stay in the Lore and Storyline. You'll find that most all the servers are filled with Role-Players. You'll usually only find the PvPers in the "Monster Play" areas.
The "Unofficial" Role-Play Server is Landroval, although you'll find Role-players on all the Servers.