Big Brother doesn't need you.
This might be one of those "If you're not British you'd never understand." sort of things, but I doubt it.
I herewith give my permission, therefore, to the British Isles, and anyone who has ever heard of the British Isles, to tell (we) Americans we are full of shit the next time you hear us say "If you're not American you'd never understand". I think I'm being fair, here.
The sad fact is that Big Brother doesn't need you ... except for elections. The only time the Government needs you to identify the miserable little backwater you call home is when you vote. Consequently, the only information they may disclose (in the US, at least), is a location so heavily filtered by civil structure that the dangerous stuff is pushed back past the 15th Decimal place. Since Big Brother doesn't need you, it works for them (and has for several thousand years).
GPS changes this, or so it seems. In fact, it does not change anything at all - except to make everyone Out-Law, which is the only reasonable description for a location system too exact, too zoomed in, to determine a legal jurisdiction except at the Country (Big Brother) level, maybe, it's a matter of pattern recognition, not science. In wartime, they are pretty handy gadgets, true, but in peacetime Big Brother does not need that specificity (notice I didn't say accuracy) and you don't need that specificity, even if it gives you some minor Out-Law thrills and the opportunity to spout nonsense about privacy being dead.
Big Brother's Laws should reflect a simple principle: Anything more dear than a polling place should be off limits. Of course the howls from the Private Sector - the sellers, will be deafening. That is to be expected because finding new customers is hard work and the Tech Industry is way out of practice.