First of all: Skitty loves Wailord.
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I could even see presenting a suggestion like: we've banned warrior cats entirely, should we consider other fan bases?
To which the answer would be "no, don't think so"
WC got the ban due to the combination of poor quality storygames / the General freeform RP ban / the fan base.
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But your reasoning appears to be based on the fact that the random button gave you a 3/8 rated Pokemon story published years ago.
Then you said we should ban anything based in copyrighted material. But not fan fiction.
I'm confused- did you think fanfic = shipping-of-copyrighted-characters, and that's what you meant to ask be banned, rather than all fanfic?
But most Pokemon fanfic isn't romance. . . ?