As much as I love seeing people rping as animals other than wolves or lions or Warrior cats, it's just annoying that these people are rping as deer...but they don't seem to know anything about them other than that they live in herds and they eat grass and the males have antlers.
Not only does it make people who are trying to be creative look bad, it helps contribute to the general consensus that "anybody who doesn't rp as a canine or a feline is weird and should not be playing FeralHeart".
And it's a shame, because deer are very interesting animals that would make for great roleplay...if only this sudden spurt of "deer folks" actually knew what they were doing. A little Google search wouldn't kill ya, people!