I wonder how much they paid a “forensic computer analyst” who hasn’t heard of DHCP.
Doesn’t matter. It’s not that they don’t know, it’s that they don’t care. This is how it works:
Invoicing company: “Hey Sky, here’s a court order for you to give us a list of customers matching these IPs.”
Sky: “Oh, ok, here.”
Invoicing company: *mailmerge*
A percentage of Sky customers: “Oh crap, I’d better pay up!”
The worrying thing in all this is, having read up on it a bit now, the chances are that the company approached Sky and asked “if we give you a court order, will you put up a fight?” If Sky had answered “yes” they’d have gone and tormented someone else. That’s a nasty precedence to be setting; BT was burned by this a few years back and decided to say “no” next time.