Consider responsibility along with privacy
Privacy is important in this world where our personal information is monetized and almost not controlled by the individual anymore.
However, a potential fallout is the misuse of a private service such as Proton by people who don't take responsibility for their actions or by people who intentionally want to do harm. I understand that Proton cannot take responsibility for how those people use Proton, and I hope that Proton won't risk being taken down due to that kind of usage.
Maybe to prevent that from happening, Proton could use some sort of "good global citizen" wording to encourage users to take responsibility for how they use the service. I don't have answers and am hopeful that Proton's lawyers are on top of this.
It's really a shame (and shameful) that the human race has such a strong dark side.