For example, in the United Kingdom, under the Mobile Telephones (Re-programming) Act, changing the IMEI of a phone, or possessing equipment that can change it, is considered an offence under some circumstances. - https://en.wikipedia.org/wiki/International_Mobile_Equipment...
Sorry for the car analogy, I had to ;)
On most pixel phones, the "equipment" is any computer with a usb cable and a copy of android SDK (adb). Better arrest every owner of said equipment...
No, it's not. If only people who require protection will try to have privacy, it will be very easy to target them. Everyone should have privacy to protect them. See also: https://news.ycombinator.com/item?id=31695383.
We survived because lots of services and relationships didn't rely on people having a mobile phone.