Yeah, I get your meaning - unsurprisingly I've also given this some thought. My irl ID is already inextricably linked to this npub, so if I wanted to say things which I knew could land me in hot water I'd use a second hand cash brought mobile dongle with an unregistered sim and a phone with one of those open source operating systems, then I'd download Amber, generate a key, download Amethyst, connect and publish, only ever over TOR.

However....expecting a newbie with no knowledge to do all that is a bit extreme. It's hard enough teaching people about Bitcoin sometimes. Helping people get set up to say things they might not be allowed to say could also land you in hot water these days.