The Facebook connect image is somewhat misleading. Sure, using FB connect can involve a screen like that, but you can also present a simple screen that only asks to "Access my basic information". Not nearly as confusing, doesn't raise questions about surreptitious posting. You can ask your customer for more access later, after you've earned trust in your relationship.
Further, some customer bases are perfectly happy using FB connect only. If you object to logging in with Facebook, maybe you're just realizing that you're not the target market for the product. No harm, no foul. If you end up offering lots of log-in options and your customer base only really wants FB, you waste development time and actually run the risk of confusing your customers.
Further, some customer bases are perfectly happy using FB connect only. If you object to logging in with Facebook, maybe you're just realizing that you're not the target market for the product. No harm, no foul. If you end up offering lots of log-in options and your customer base only really wants FB, you waste development time and actually run the risk of confusing your customers.