I actually have a particular use case for not adding one - as a running joke I changed my Signal name to the screen name of a buddy that went AWOL. Adding a las

I actually have a particular use case for not adding one - as a running joke I changed my Signal name to the screen name of a buddy that went AWOL. Adding a last name doesn’t work in this model. So it’s not just about not wanting to share information, but it ruins a joke in the group chat I primarily use Signal for :/ To top it off, it specifically says it’s optional. But you get reminded every week to add one... but it’s totally optional.