But surely the later is simply a way of enlightening the former? Is this not just another source of police intelligence? How is it different from me telling the police that the bloke at number 57 (Mr Mike WM) comes and goes at funny hours and has some shady looking blokes round.
Fortunately I don't live at a #57 else I'd be concerned
But this is more like the police having a record of when *everyone* comes and goes, and who is visiting their home, and running some algorithm on that to throw up things they think are suspicious. Note not necessarily *actually* suspicious - people have already torn apart the examples the police officer in the original post said would be considered suspicious.
I agree. However, MOST people don't care.
I think most people haven't really thought through the implications. If they did, I think more people would be concerned.
I don't disagree, however I am a realist and try to be pragmatic. This isn't, in my view, a big step down the slippery slope when Facebook knows everything about me, even if i don't tell them it.
You can opt out of using Facebook entirely though (I do). Yes, other people may tag you in photos and stuff, so that's not a perfect solution, but it is mostly possible.
Of course it is possible to opt out of this potential 'travelcard' data collection too, by paying for a paper ticket with cash. But, in my opinion not entirely coincidentally, that is getting harder and harder to do.
I agree with being pragmatic, for what it's worth. For example, I don't exactly try to hide my identity on here - there's probably not a lot of MikeWM's living in Ely, more likely than not I'm the only one. But I see what appears to be an ever clearer direction of travel here, and I really don't like what I think the destination will be.
PS Don't get me started on those Alexa things!
You may guess I don't have anything like that

The only things connected to the internet in my house are my computer and my iPad etc. My 'smart' TV has never been connected, for example.
I would counter by saying commercial entities are much more willing to trade the data you, voluntarily, give them. They are much more willing to use that data to influence you and keep you spending. I don't know which rules govern the trading of my data by commercial entities. I reckon i could find out which rules govern the police quite quickly and then work out how to seek redress. Honestly, I am more worried by commercial collection and use of my data than the police looking at a database of my travel history!
To some degree you're correct, but the key word there is voluntarily. Usually - admittedly not always - there are ways around doing so, even if eg. they mean you don't get a discount on something.
Things that are going to be reported to, and tracked by, the state, are rather more troubling in my view. They tend to be things you can't avoid, and can be used in significantly more draconian ways than companies can manage - eg. freezing your bank accounts (see the Canadian truckers protest). Imagine if that were done every time you ran afoul of an algorithm saying you were 'suspicious' and how much trouble it would involve to get fixed (and the issues it would cause you in the meantime - especially if cash isn't an option anymore).