See LinkedIn Dark Patterns [0]. It explains how LinkedIn *tricks* one into shari...

See LinkedIn Dark Patterns [0]. It explains how LinkedIn tricks one into sharing contacts.

  There we have it, finally signed up and signed in to
  LinkedIn. The next part of the new user experience is filling
  out your profile. Depending on how you count, LinkedIn tries to
  import the user’s address book three to eight times. It
  shouldn’t be this hard to sign up for a product without giving
  away any unnecessary information.

Related HN discussion [1].

[0] https://medium.com/@danrschlosser/linkedin-dark-patterns-3ae...

[1] https://news.ycombinator.com/item?id=11063178