Facebook recommends patients with a psychiatrist's number on phone friend one another—outing them to each other. 

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Yes; but at least it isn't going to then out a doctor's patients to one another. Still, security where people are at is best.
WhatsApp's end-to-end encryption has been a gamechanger for activist security; they also have to use what people use. :-(
One of the problems is that people don't understand that giving an app access to contacts means giving the app PROVIDER access, too.
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