Add friends without using private datas
I think i'm not the only one thinking about that. Why everytime applications ask for your private datas. As Waze is a very useful app, it should be open for everyone. Therefore, it would be only a possibility to add friend by phone number, contact list, Facebook or twitter and not an obligation. For those you don't want to give the phone number or something else, it would be great to add someone by the login account or a nickname like in Skype. You ask for a login and Nickname, why don't you use it ?
android: XPrivacy or DonkeyGuard
If you are concerned with privacy as you claim you ought rethink how facebook/twitter/skype function- and the less apparent costS.