On & after 2/13/2014, a number of articles were published noting @Facebook’s addition of the gender-neutral pronoun “they/them/their.” Examples: https://www.autostraddle.com/facebook-wants-you-to-do-you-adds-new-non-binary-pronoun-and-gender-identity-options-223746/ & http://www.slate.com/blogs/future_tense/2014/02/13/facebook_gender_options_male_female_and_custom_plus_preferred_pronouns.html IIRC, prior to 2/13/2014, I was professionally polled at least once on the ideal neutral pronoun (including but not limited to, ze/zir, they/them/their). Guess which one I answered…