You need an existing account, which you can't get if you:
- disable javascript
- don't verify with a phone number
- get stuck in captcha hell
verify with a phone number is notorious for blocking google voice number blocks and detecting devices that aren't pinging cell towers
Plus, as somebody else already said: having JS enabled seems pretty much mandatory if you want to be able to decrypt your emails client-side.
In the EU countries, it has (by law) become very hard to obtain an anonymous prepaid SIM card.
How do you want to decrypt your data client-side without running a software to do just that?
