And it's up to you to define what you believe is the correct social parameters? At the end of the day, they aren't hurting you in anyway. So why try to bring them down just for existing?
Many cultures throughout history displayed gender fluid social beliefs, this male/female binary is a Western invention and many cultures throughout the world did not have those set gender roles until they were imposed by the Western countries. Hundreds of languages throughout the world have genderless language.
The Native American's had 'berdaches', who were gender variants. For most Native American societies, biological sex had nothing to do with gender roles.
The Hijira people are officially recognised as a third gender in the Indian subcontinent (Indian, Pakistan,Nepal, Bangladesh), their history going back so far that they are recorded in roughly the year 300.
Some suggestions that the ancient Egyptians believed that the afterlife was achievable only by men, therefore actions were taken during burial to make the females more feminine, and referring to them with male pronouns.
The Māhū were respected in Hawaiian and Tahitian culture until colonialists arrived and forced their beliefs onto the locals. "Māhū were particularly respected as teachers, usually of hula dance and chant. In pre-contact times māhū performed the roles of goddesses in hula dances that took place in temples which were off-limits to women. Māhū were also valued as the keepers of cultural traditions, such as the passing down of genealogies. Traditionally parents would ask māhū to name their children."
Historical Brazilians had 'men' and 'not-men', where anyone who was not a masculine male (whether just female or a feminine male) was a 'not-man'.
