That policy has since been updated to allow singular they, despite Stallman's objection to singular they.
But now the footnote of the policy would allow you to call a trans woman "they" and never "her". That's not something transphobes (or anybody else) would ever do to a cis woman.
But now the footnote of the policy would allow you to call a trans woman "they" and never "her". That's not something transphobes (or anybody else) would ever do to a cis woman.