Just remember that if you use that link to create your char and fight him (and lose), you will become his apprentice and give him free exp when you level up.
Just like I give xp to the one that told me about it and he gives xp to the one that told him about it. You make it sound as though I'm tricking people. And "apprentice" is overstating the matter, anyway. The game rewards you for introducing new players by giving you a bit of experience when players you initiate join and level, it's not like you have any actual control over anything they do and it's not like they can't accumulate a massive following of their own.
So, in short, I don't understand the complaint, but if people are worried about it, I guess go to:
instead and I'll get no credit. There, magnanimous enough for you? It's a fun little browser game, don't let wintersong scare you off.