What we see in the map can be easily done by the phone company just seeing in what cell your cellphone was registered.
Bad things happens when you can cross info from multiple locations specially to people who like to post everything they do on their social media accounts.
Public transportation chip cards used here in Argentina also track the point were you get in, and to get one you need to show your documentation and have it assigned to you personally. Many people exchanges their cards to avoid the Gov know who is who.
I think in modern society we are fucked, you can be tracked at all times.
Some quick steps to reduce risk:
- Don't tell the world what you're doing in your social media accounts
- Take the battery off your cell if you don't want to be tracked
- Use cryptography
PS: Burt, nice to see you back