That's not what the term originally meant at all.
"The primary definition of a Fluffy Bunny is one who refuses to learn, refuses to think, and refuses to consider the possibility that they could possibly ever be wrong. Generally, they find one book, author or website and follow it as if it were the holy word, frequently denouncing anything that disagrees with it as obviously false. Fluffy Bunnies rarely get past the defense of "Because [insert favorite author here] says so." Sometimes they don't even get that far, responding to any and all criticism with something like, "You're just trying to persecute me!"
If people who role play, or believe outrageous things come here and attempt to not only discuss it in a serious manner, but refuse to accept anything else as truth, the term Fluffy Bunny does indeed apply to them.
And if you re-read that accepted definition (accepted by the vast majority of the Pagan/Occult community), a large portion of people on this site and in that chatter fall under the definition.