What I was thinking of was a dual-port site, so that people could connect to DU via the public web or via the darkweb. So the site could accommodate the spectrum of paranoia -- from no-worries to my-visa-has-expired.
Btw, if you google (er, duck-duck-go) 'advantages of using the darknet' you'll find more than a few positive reasons for the darkweb -- it's not all drug dealers, hackers and spies.
E.g. https://www.makeuseof.com/dark-web-legitimate-uses/
Humor: from the above:
9. Access Social Media
...
Surprisingly, some of our favorite social media platforms on the surface web, among them Twitter and Facebook, have launched mirror sites on the dark web for users who wish to avoid government monitoring.
I suspect the GOP already has all of the private info stored with Twitter (duh), Facebook, Instagram, et al. But I've read that to get a US visa you're required to turn over all your social media accounts and make them public access. So access via the darkweb might give some reassurance that they could omit DU from their public profiles. Our free speech rights are clearly not applied to people begging to be let into the country.
Ofc proper use of anonymous email and VPN's makes this unnecessary, but I think that evaluating VPNs and anonymous email services is beyond the tech abilities of most people. But ... encouraging darkweb use might be a net poor idea -- e.g. more exposure to scams and malware for DU users, and guilt-by-association for even using Tor.
And yes, I hope that all of this is just excessive paranoia. But then I look at the requests for voting rolls and I have to think they're going to challenge every registered Democrat.
Btw, thanks for your thoughtful reply. DU is an invaluable resource!