Hiei went to a Shishiwakamaru Fanclub page.
Ok, so there's more to the story than just that... It was a LJ - not a fanpage like I made it sound like. It seems this 'Rin Kawa' girl has been bugging him to death about some silly fanpairing. It must've said in his Info Page that Rin Kawa was listed in his 'Friends Of:' section, or something. He claims he went because you need to "know your enemies."
She's a little fangirl... Not his enemy.
I just find this whole situation highly entertaining.