If this person’s beliefs are sincerely held, showing people on the internet the “the right way” to go about being serious about privacy is an impossible task. One can’t be on the World Wide Web and “be the change they wish see” (i.e. not be on the web) with regards to their privacy perspective.
And I’m not sure if it’s defeatist to state that all of us, just by being online, likely have some hooks in our mouths. It’s just the cost we pay for not being luddites. Yes, there’s benefits to not having a ton of hooks in us, which is why we do what we do, but even one hook is enough to steal your private info and sell it to everyone. We’re posting to the World Wide Web after all, not Gopher/Gemini/Onion. Hell, this goes beyond the internet since the DMV freely sells your personal information too. We make these limited sacrifices so we have an actual community instead of feeling like we’re self-righteous in our loneliness.
Blue or Blue-Rare are the steps above rare afaik (at least in the US, not sure about England). Any restaurant that asks “what does that mean” isn’t a restaurant I’d trust to serve me meat that is cool in the middle.