Earlier quoted context omitted.
Please don't say that. We already had such pain from HTTP, FTP, and SMTP not starting with it. If building the next version of internet discussion and sharing, we really need first-class support for encryption.
no, we really don't. Not every tool needs to be equipped for private discussions. ActivityPub and OStatus are used for Twitter-style communication. Those aren't high security communication services.
If my personal twitter-style communication got out it would be worse to me than my more private messages, but it is worse to me personally if all the twitter style communication gets out than only my more private messages.
You have to account for manipulative big data risks in your analysis, thinking only about your personal data is an outdated approach.