[snarkinatree]

This is also how OpenDNS makes money. Neustar does the same. And probably others too. They call this "DNS service". Anyone can run a resolver, including your next door neighbor. Unless you live next to a datacenter, your neighbour's "DNS service" will likely be faster than Google's or any commercial vendor. It's been suggested the optimum number of users for a decent cache is probably around 10 [source: IPJ]. Can you trust 10 people not to poison the cache? How many users do you think the "DNS service" providers have? Can you trust each and every one of those users? As for DNSSEC, most people running authoritative nameservers for websites do not support it, let alone most domain name registries.

Interesting to note: no rDNS for either of those IP's.