You’ve made a sweeping generalization in implying that since 4chan “as a platform” has caused harm, then all of its users are guilty/complicit and must relinquish their right to privacy. That and you’re still misunderstanding the meaning of “fundamental” in this case, since that adjective would suggest that the right in question is not counted among those that would be taken away from you in case of moral/legal transgressions.

So privacy is a “fundamental” right, except if /u/[email protected] thinks you’re a distasteful individual.

Woops, yes indeed, I just corrected my comment!

The clients are closed source, but they use Matrix bridges to connect to various messaging services, and those are in fact open sourced.