a) it's possible to be a fan of furry art without engaging in the make-believe aspect of fursonas
b) Spam. Kimberly's profile pic looks like a stock photo from 'hot singles in your area' spam
c) Those users who consider their character, who's a human but has cat ears, to be sufficiently furry enough for f-list
d) “F” stands for fetish, and the mascot had no more relevance to the site than Tony the Tiger does to breakfast cereal
e) Government agents hunting down the cub/shota fans using fake accounts