No, we would not provide a name change. If you believe someone is harassing you, you’ll want to use the tools available to report them. On the forums, report their post. If a moderator agrees, they will take appropriate actions.
For the name change, it is important to understand how they work. Your name will update on any list that you are on in-game, Friends Lists, Ignore Lists, Guild Roster, etc… you don’t disappear from lists.
As for the forum, you could just as easily switch posting characters.