@nus @robpomeroy @Lockdownyourlife
federation is a problem for “make all your posts invisible with a single flag”, alas.
That’d be a bit like like trying to make all the emails you sent turn invisible in all the remote inboxes to which they’ve already been delivered.
If servers respect such a signal, sure they could be polite and redact the messages of yours they have on hand. Of course, abusive servers are likely to ignore that. But maybe it could be a handbrake of sorts?