Services like CloudFlare need to adapt to the changing realities don't they?
Though surely it has long been poor to assume anything from the source IPv4 address as regards to blacklisting, greylisting as presumably most people are coming from a shared pool of IPv4 rather than a static.
I thought these days browser session cookies would be the distinguishing attribute not the re-use of an IP address.
prlzx on iDNET: VDSL / 21CN at ~40Mbps / 10Mbps
with IP4/6 (no v6? - not true Internet)