[lazyjones]

But what is somebody supposed to do with this list, when it contains dynamic IP addresses used by many people? Ban everything on it, based on the assumption that some of them are actually endpoints of suspicious activity, thereby preventing many innocent people from using the Internet?

At my previous company I dealt with all the scraping bots for 15 years, in the end I even banned all of Tor and many of the commercial proxy network providers, with the justification that our site (CSE) didn't need anonymous posting because there was nothing sensitive and no private information on it. But I couldn't ban dynamic IP addresses for more than a few minutes since all the abusers originating from them happily obtained a new address within seconds and continued the scraping, rendering the IP address pool used by their provider completely banned from using our site.

[sam_lowry_]

I should have filtered IP addresses, leaving only ranges before posting. Mea culpa.

IP addresses are blocked in a different context but land on the same list.

Still, to answer your question, dynamic IP addresses can be sticky. Where I operate, some ISPs lease the same IP address for each IP lease renewal. The only way to get an IP address is to wait until the lease expires by e.g. switching off the router.