Trolling the forums isn't the only way to become realm famous.

On my realm, there is this tauren hunter from finland that reached fame as he ganked and corpsecamped every single alliance he could find. Even as grand marshal he never stopped. I have this distinct memory of leveling my rogue in duskwood, and suddenly having him appear and gank me, followed by a 30 minutes corpsecamp session. I even managed to escape and stealth several times, often loosing sight of him, but he always tracked me down and ganked me until I eventually managed to escape. He was kind of a forum troll aswell, but that wasn't where his fame came from.

There was also this moonkin who reached fame during tbc because he spent most of his playtime at the elemental plateau, ganking, or atleast trying, anyone who had ever attacked any of his characters (he posted his KoS list on the realm forums once, I think it took several posts to fit it all in). When we were bored, me and an irl friend always went to gank him, and he was ALWAYS to be found at the elemental plateau.