Isn't this actually an ongoing issue on eth? Vast majority of wallets are web-based so ISP has a record of every address requested by the IP address
when using most of the altcoins such as etherum users have a lot more issues to be concerned about rather than their privacy and their IP address being recorded. that is why we see a lot of web wallet usage, no PGP verification or even existence of it for desktop wallets either. and a lot more.