So I guess when people want to report a crime and remain anonymous they won’t be able too. So they’ll report less crimes and then the governments can publish nice reports showing how crimes have gone down.
If you want to report a crime anonymously then you'll have to call from an anonymous number. Unless you are using a prepaid phone that was purchases with cash chances are a call can be traced back to someone.
This new system just gives EMS an exact location of the iPhone from which a call was placed. The other information like caller id is already available.
Cell phones are continuously providing their location to the cellular networks as are many apps. If you don't want to be tracked either power your phone down or don't carry it on you person.