I'd like to address this nonsense about anonymously signing a letter being some sort of sacrosanct seal of the confessional protection.
I've signed a few letters in recent times that have been making statements in support of the principles I truly believe in. I have sometimes done this with relative anonymity because I genuinely fear the batshit behaviour of the TRAs who make rape and death threats, and I have vulnerable children whom I need to protect.
But, I have done so, weighing up the reality that if I put my name to something, I may well be called upon to own it publicly at some point, even given the risks, and I have signed in that knowledge because I have integrity.
If you do not believe that what you are signing is entirely right, do not sign it. Doing so anonymously, if you don't, doesn't give you a pass if you are ever revealed and you then claim you either don't really agree, or would never have said so publicly.
This mealy mouthed hypocrisy because you're embarrassed that you've been revealed to be a bit stupid and tend towards actual fascism is your shit to own.
Let me reiterate - I have signed things I believe in, and I will defend those things openly if I must. I will not whine that I thought there would be no one asking me to justify my actions, as though asking me to do so is being unreasonable.