If you or your business idea wish to succeed and attain this goal or directive you desire  <br/> Then the simplest solution would be to make this social media sign in idea more appealing or rewarding in anyway possible for the clientele you seek.

<br/>  What is the point of anyone doing anything out of there usual safe known practice when it heightens the risk factor in any way whatsoever.  <br/>   After all this is the World Wide Web.  <br/>

Security is a major issue with social media, facebook especially.  As you can see pointed out clearly by the responses to your Question " IDEA ".  No reward No apparent benefit then highly likely, No social media sign in.