I tend to avoid using Facebook sign-ins for sites if they want permission to post to my wall. I think sites should explain what and when they post. For example,

I tend to avoid using Facebook sign-ins for sites if they want permission to post to my wall. I think sites should explain what and when they post. For example, your site could post things like "Joe just signed-up for SocialLeaks where he can tell secrets about his friends!" (bad) or "Joe just leaked some juicy information about Nancy!" (also bad). So, out of curiosity, what do you post on people's walls?