[Margh]

> These are non-technical people who understand the importance of keeping their contact list private

Do you take this opportunity to point out to them that they do away with this privacy every time they install whatsapp / fb messenger / hangouts / skype / practically anything that asks for contacts permissions?

[andreyf]

The last person I'm recalling this conversation with actually blocks Whatsapp / Facebook from getting her contact list, but trusts Microsoft and Google. I'm not sure how representative that is, but I wouldn't be surprised if people trust big companies with big brands over relatively no-name startups in this regard.