If you're going to do any vetting, the time to do it is at registration, not at crunch time.
The bulk of the discussion over the past few days was directed at the practice of rapid updates of BRAND NEW DOMAIN NAMES. Clearly this is entirely separate from the issue of updating information for an established domain name.
Designing a system which doesn't allow for some level of anonymity (let's say for whistleblower/bloggers) requires some serious debate that goes far beyond "what are the security implications."
That is really a separate issue. This discussion is about limiting the damage caused by domains which do rapid NS switching. If we know which domains are new, DNS operators could put them on probation and only allow a minimum TTL of 1 day on those names. The domain owner can still switch NSes but the queries won't chase him, therefore he will sell less product and quickly stop doing NS switching. If he's not NS switching then it is easier to track him down, blackhole him, filter him, whatever. --Michael Dillon