For bluetooth messaging there is no invasion of privacy, since the only data collected is the mac address of the phone’s Bluetooth protocol, which has nothing to do with the phone number and then with sensitive data. There is also a request for authorization to send the file to be accepted by user before sending the file itself (we can provide documentation prepared by a consultant in this regard). For the data gathered via Facebook, privacy policies are underwritten by all users of the social network, so when a user accepts access via Facebook, he accept to share your account information with you (we can provide documentation prepared by a consultant in this regard).