No one who wants to talk securely should ever use a facebook-owned channel in the first place.
It's one thing to say "they shouldn't use a facebook channel to talk securely", it's another to say "they shouldn't use a facebook channel on the same device as they use another channel to talk securely". My understanding of this was that it is the latter.
Unfortunately people often don't have the luxury of doing the latter.
> Unfortunately people often don't have the luxury of doing the latter.