+1 I’d love a [ ] show at signup option.
@Kris’s custom CSS approach doesn’t do what we want here, because if you use that technique, it hides the field both on the signup form and in the profile.
My use case: we want to allow users to optionally declare their pronouns with a free-text field (because some users use unusual pronouns to refer to themselves), but a field like that is a honeypot for folks who think that “pronouns” are a political offense; new users get inspired to type something rude in the box.
We think it’s better not to show the field on signup, but to allow engaged users to set it by customizing their profile.