[SomeStupidPoint]

It also might be on purpose -- if you have a signature, then unsigned things aren't you, right?

I suspect it was largely accidental, though. Heck, there's been private entities I know who have ended up with tells that pinned them to timezones.

[Luc]

Easy to do with e.g. postings to forums, including those about bitcoin...

[SomeStupidPoint]

I've generally given up trying to conceal anything above what city I'm in.

There are just too many information leaks that can be used to track people back to regions, and I honestly don't care if people know I'm one of millions of people.

(Whoops, there goes another -- there's only 53 US metros above 1mil people and 34 above 2mil.)