The vast majority of what you've mentioned here, I can almost guarantee none of us ever really give a second thought to, because we are law abiding citizens with nothing to hide from the police. (I confess, I had no idea the fobs contain data, now that does sort of creep me out). That said, that's exactly the problem for those who are normally a law abiding citizen, and then one day decide to I dunno, kill someone and hide the body. They also don't think about all these ways they've been tracked all along, but it's the FIRST thing investigators will start gathering to look over - all the electronic evidence.
Despite the fact I follow so many cases where digital evidence comes into play, I still find things all the time that are "tracking" me that I never knew about previously. One example is with google Chrome. Loads of people use it, and most know you can delete your search history. What some folks might not know, is that clearing your history is all well and good but you better take a look here
https://myactivity.google.com too, after you've cleared your history. Then, you need too look at your synced phone's history too, because it doesn't always actually clear everything. This is just 1 tiny little thing, and there are 100 of them, if not more, tracking us all over the place, as you've mentioned. Quite literally from my front door to my car in the driveway, I am tracked by my phone, my fitbit, and my Ring cam that recorded me leaving the house. Once I get in the vehicle and turn it on, GPS is on as well. I haven't even
left my driveway yet and I've been tracked by 4 separate devices - not to mention whatever home security cams folks next door and across the street might have. It's kind of mind boggling really, but here we are.