Uh, I think the Glove80 uses Choc switches, right? For heavy tactile in Choc you would want Burnt Orange. Not sure whether that's an option they provide or what.
Bastard Keyboards -- I've talked with Quentin and he seems like a cool guy. He's an innovator in the use of printed-circuit boards for keywell keyboards. That's important because it makes keywell keyboards much easier and quicker to make, without the huge cost associated with polyimide flexible PCBs. He has high quality standards, too, in my limited experience of his products.
There are many ways to be more selective about from whom to accept email. SPF, DKIM, DMARC, and various blacklists are among them. They are supposed to make life harder for spammers. But they have also made running a mail server something that few dare to try anymore. Setup is not easy, but getting blacklisted is, and it causes silent delivery failure, and takes days of work to fix.
As a result, most of the email is run by Microsoft and Google. But that didn't stop phishers. They just go after people at smaller companies where security isn't as tight yet, and then they've got valid Microsoft accounts to send from. Liars and Outliers by Schneier is about this sort of dynamic.
As for PKI: If I may assume you to be, or have been, affiliated with an armed service -- Whose property is your CAC? And why did you use a pseudonym to make this post? (I mean to be pithy, not sarcastic.) I think Liars and Outliers by Schneier is all about this sort of thing - but I didn't get much of it read before it was due back at the library.