Also, easiest way to break group encryption is to get yourself invited to a group. If a group never deletes anything from its relays, then someone added much later can see eeeevvvveeerrryyyttthhhiiinnnnhgg.
Discussion
as guys, we don't really truly understand how devastating this kind of breach could be unless we have sisters or cousins or other loved ones who've had to deal with this kind of pyscho stalker behavior.
even then it's only from a second hand account...