You can use Amber as a signer and select it to not sign generic drafts.
Discussion
I get that there are multiple hoops users can jump through after accidentally discovering that the app is secretly saving drafts.
That's not the root issue here.
The theme of my problem is trust, not the technical aspects. This is something taught in customer 101 (or user in this case). What's the real issue here? I could also just not use Amethyst, but I care enough about the project to voice how I feel about decisions like this. It's an incredible app that has no alternative for me yet. Otherwise, I will support an alternative if it comes at some point. That's the truth that no technical workaround will change.
I'm sure I'm an extreme minority here and that's fine. It is what it is and the devs have many things to consider beyond my opinions. But he asked. Workarounds aren't enough for me. The trust is still broken by not clearly telling people this is happening and allowing them to easily stop it by not opting in.