[q3k]

For what it's worth, Poland is surprisingly good about this:

- as an ISP, you're required to retain data for a year that would let LEAs map an IP address you manage to a subscriber. If you're giving out public IP addresses to your customers, this can be just an excerpt from your IPAM.

- as an ISP, you cannot give out this data without a court order, and you will be in violation of data protection laws if you do do.

Source: the Warsaw Hackerspace is an ISP.