Re: you can't be serious
"Not much use unless you know the location of the router"
Geo IPs will buy data that confirms what they already know if it was collected more recently or helps to build out the picture.
"Netgear don't. The ISP (probably) does"
They may not, but they may as Netgear supply ISPs directly. As would many gov agencies, 'cleared' third parties, even their sub-contractors and in some cases, even lowly employees. None of whom are disclosed and have any onus to take much care with what they use or leave behind.
"the location of connected devices is only useful if you know that they stay connected at that location, and mostly these days they don't"
Not sure how you decided this, sure some people hop address but a lot of people stay connected for weeks/months on end nowadays even if their ISP allocates them a new address every time they re-connect. However a lot of ISPs provide static addresses to a significant proportion of customers, and others provide nothing but static addresses, so their customers NEVER change their address. And then there are all the others that manage to stay within the timeout period of their allocated address and receive the same address each time they re-connect.
Biting the hand that feeds IT
