Privacy first, not privacy always.
Basically, I accept the fact not everyone cares as much as i do, about their personal privacy.
So, although I would consider a privacy orientated solution to my own problem first, i cannot expect that of others, so, its not the end of the world. I would take steps to minimise it.
So, install whatsapp. Dont upload a profile picture other than a dumb meme. Dont have your name in profile. Dont plaster your life into messages.
Or, dont, and only interact with others who follow your strict rules of engagement.
Its a fine line. Between privacy militant and privacy conscious.
Im assuming the latter.