This is a bit tangential to the author's point but it does seem to indicate that IPv6 is mostly pointless for human users for exactly this reason.

Since it's so much easier to hide behind a new unique address, compared to IPv4, that any service such as Cloudflare would need to be extremely aggressive in blocking to meet their internal metrics and customer advertised minimum thresholds.

So much so that it actually costs more to use IPv6 then sticking with IPv4.

I imagine the scenario described by the author would become more and more common as time goes on as more of the world's internet users becomes harder to distinguish.