I can't think of anything less trans-friendly than mandatory pronoun marking.

I quite liked this quote from Isabel Fall (more about identity than pronouns specifically, but still related!)

“We make boxes that seem to enclose a satisfying number of human experiences, and then we put labels on those and argue about them instead,” she says. “The boxes change over time, according to a process which is governed by, as far as I can tell, cycles of human suffering: We realize that forcing people into the last set of boxes was painful and wrong, we wring our hands, we fold up some new boxes and assure ourselves that this time we got it right, or at least right enough for now. Because we need the boxes to argue over. I do not want to be in a box. I want to sift through your fingers, to vanish, to be unseen.”