With a phone contact book it's not about you, it's about protecting the personal phone numbers others entrusted you with. If you are careless and loose them (fo

With a phone contact book it's not about you, it's about protecting the personal phone numbers others entrusted you with. If you are careless and loose them (for example by using any of these "modern" IM systems that insist on getting all your contacts so you don't have to add people you know one by one) it's you fault friends will be getting advertising phone call at 3 in the morning or worse.