I'm not sure if something happened which caused a mocking reaction like that but to answer you question, who knows? It's the internet after all. Take a look around and you'll notice that a shitload of male users pretend to be female, and this is just an example. Most people will believe your words as long as they can't prove that those informations are wrong, which is a little bit difficult if you don't know the person at all. Anyway, you can pretty much expect an answer from Ryu or Ulti.