With Find My iPhone turned on in IOS 7, the Apple ID and password of previous owner will always be required before anyone can:
1. Turn off Find My iPhone on device
2. Erase device
3. Reactivate and use device
Activation Lock in iOS 7 > http://support.apple.com/kb/HT5818
, it is starting to seem impossible.
The Apple ID and Password that was Originally used to Activate the iDevice is required.
If you cannot get this information > Removing a device from a previous owner’s account
You need to return the Device for a refund.