Anyway her analogy doesn't work even on her terms.  You don't have to stay calm when you get catfished.  You don't have to tread carefully, and you don't have to stay.  You can immediately flee while squealing in cowardice and you'll do fine.  The fatty won't and probably can't follow. A shark could follow you and threaten you, because it's an athletic predator that's in its element.  An obese human is only in its element when sprawled on a couch, and its potential for violence needn't be feared by anyone capable of walking briskly for several consecutive minutes.