I think this might be a bit harsh. ;) However I do agree it would be much better to set up user expectations for the benefit of linking their account: explain

I think this might be a bit harsh. ;) However I do agree it would be much better to set up user expectations for the benefit of linking their account: explain to me why you need this information in a simple, preferably visual way. Also, would be great to have a way to unlink my Twitter/Facebook credential from the app.