To Summarize: 1. using the same password for spotify and facebook is a dumb thing to do. don't do it. 2. by entering an email address instead of a username me

To Summarize: 1. using the same password for spotify and facebook is a dumb thing to do. don't do it. 2. by entering an email address instead of a username means spotify will use facebook auth (it should be made more obvious to users). 3. using facebook api to auth will re-enable your facebook account (apparently restoring photo's and friends lists). 4. facebook adds spotify as an app and gives it access to your facebook account data without explicit permission.