alt Hacker News> The dilemma for bots: when tokens are bound to the connecting ip, scrapers must limit the connecting IP pool for each site they want to scrape, becoming much more obvious and easy to block, or they have to use massive amounts of compute.
You can't do that any more. Too many ISPs, especially mobile carriers, don't hand out anything resembling a fixed IP address any more. It's CGNAT and constantly changing IP addresses alllll the time now.
On a small enough site (even LWN might qualify) the chance of two random sets of client IPs intersecting can be quite low.
Private trackers do this. If they ban a user that geolocates to a certain city and ISP, they'll ban new signups from that city and ISP because there's probably only a few users from the same city and ISP. And then report to their friends at other trackers, that a user with that city and ISP is trying to evade a ban.