In message <F92C6547-D30D-438C-9A07-808C796A86BA@rfc1035.com>, at 15:54:35 on Sat, 25 Jan 2014, Jim Reid <jim@rfc1035.com> writes
Roland, you seem to be going off at a tangent. If you want to continue a discussion of what a "clueful" DNS user or robust DNS service means please take it to the DNS Working Group.
There's no need, the extra resilience that redundant NS brings to the table is well understood. The question remains, however, as to whether individual website owners are expected to understand the hosting products to that degree of technical detail, or should they expect the services they are buying (from people who ought to be familiar with Best Practice) to be delivered to a reasonable standard. In other words, isn't it the industry who should be clueful, on the users' behalf? Although not immediately applicable to this document, it is however a question for governments and regulators with their "consumer protection" hats on.
In the context of the document we're discussing here -- DNS blocking for government and regulatory people -- the point that should be made is that DNS service for some domain does not necessarily rest with a single entity.
A simple tool for extracting this information from the DNS would be quite helpful for non-technical readers. -- Roland Perry