I wanted to log in with Twitter (don't like FB..), but you wanted to have quite a nice list of permissions. Without even knowing a lot about your app, why should I agree (I didn't)?
Can you explain what you do with the social network accounts?
Can you explain what you do with the social network accounts?
Email addresses are a concern as well, of course. We won't email you unless you authorize us to do so in your account settings.
Something like 'We never post something without your consent but might allow you to share your achievement in the future' or a more eloquent version might have relaxed me enough to hit 'yes'..