If we must do that, shouldn't we do that across the board?
I agree that they tend to write crappy storygames, but we will never get a good one if we keeping telling them to go away.
If you're going to post links like that, then you should do it for just about every single book in the reading corner because none of them are really just as relevant as a warrior cats fan talking about warrior cats on the site.
There are other crappy fan fiction-ish storygames on this site.
http://chooseyourstory.com/story/mario%27s-adventure-island (maybe not as badly written as some of the warrior cat storygames, but still horribly linear)
http://chooseyourstory.com/story/adventures-in-skyrim (better than most of the warrior cat storygames writing wise, but just as linear)
http://chooseyourstory.com/story/princess-twilight-sparkle (better written, but still quite linear, also does an extremely poor job of introducing the reader to the world like a lot of the warrior cat story games do)