It's not a pitch for implementing WoT. It's a thought experiment to show that it could be viable. It won't make anyone happier if that's what you want, security

It's not a pitch for implementing WoT. It's a thought experiment to show that it could be viable. It won't make anyone happier if that's what you want, security never made any UI more pleasant. The system might send you an e-mail if someone casts doubt over the trustworthiness of a key. If you lose your phone with your keys, they're gone, just like when you lose your keys. I never said big scary warnings. Just small reminders that what's happening isn't secure, like the green bar in your browser. Most of the time harmless, but informative when you need it.