From the kow article:
UW Trademark and Licensing Director Cindy Van Matre says fans can tell the Bucky is fake based on its "puffy features, odd coloring and sloppy sweater."
Don't those characteristics strike you as a mark of authenticity, really? Or, at least, a realistic representation of game-day life within walking distance of the fecal-pellet spire?
Not to belabor the point, but saying that any manifestation of BB is "fake" is redundantly redundant.