This. Rate-limiting can help...I'm quite sure Google has rate-limiting in place on 18.104.22.168 for instance. But for those who don't have Google's budget, it's a challenge. There are not currently any sufficiently tested and stable DNS rate-limiting features in any of the top 3 resolvers out there. The problem here is networks letting spoofed packets out of their nets, not DNS servers performing correctly.
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So maybe Dwight Shrute was right — smiling is a sign of submission."Occasionally we're surprised into laughing at something funny, but most laughter has little to do with humor. It's an instinctual survival tool for social animals, not an intellectual response to wit. It's not about getting the joke. It's about getting along.
...When you're low in the status hierarchy, you need all the allies you can find, so apparently you're primed to chuckle at anything even if it doesn't do you any immediate good.