To be fair, and speaking just on your "very proper" usage of the english language - According to the
Oxford English Dictionary, usage of the singular "they" has been traced back to the 1300s. Though, this shouldn't even matter as language is fluid and constantly evolving, for example: the debate on (
Aks versus Ask, (in which Aks is the older form of the word Ask, and while it has evolved into ask, it is more natural for us to say "aks").
I feel, however, if someone asks you to kindly refer to them with a different set of pronouns, it's only polite to do so.
Edit Also, blame our favorite necroposter for this one, TeraRamis.