I mean, I just went and installed signal on my whole families phones one druken evening (I have 7 sets of aunt's and uncle's, no small feat). Now we communicate all through signal and they didn't even realize it helped them lol
Then all the sudden a week or so ago they freaked out and I was like - no worries, remember that one time I switched your text messages?
My family primarily communicates in texts, phone calls, and in person. So this was relatively easy, myself and the other half the family either stopped using Facebook years ago, or never used it in the first place.
Easy really, and not necessary