Earlier quoted context omitted.
You might think such a scheme is "requisite", but the fact remains that there is insufficient incentive for the ISPs to do them, and they plainly don't do them, as my cited example shows. You can assign blame however you like, but it won't help your IPv6 customers/users to reach your servers.
I really don't know what your example shows, because I don't read Swedish, and the Google translate version is predictably mangled and difficult to parse. To the extent it says anything, it's very vague and seems to recount a single, unique incident. This and your apparent inability to provide case studies in English leads me to the belief that the problem is rare. I'll also add that I've been in the employ of a comp…
This data would be better than my anecdotal story about an unnamed company, so please provide any you have.