The dueling political demands of accuracy and privacy are simply incompatible at some level. After reading this, maybe Hanlon's Razor isn't the right standard. Besides malice and stupidity, there is impossibility. Some problems just aren't solvable under certain constraints. I don't envy the statisticians tasked with finding a politically palatable solution to a math problem.

But the strength of differential privacy is that you can now make this tradeoff explicit and quantify it. I always liked it because it offers a mathematical solution to a policy problem, but then of course it's up to us to decide what parameters and tradeoff to choose. Also, some data might just not get published at all if the privacy implications are too problematic, so differential privacy might buy you more signal!

There's a ton of information in the US that is accessible to various degrees--especially through the the deep web much less background investigations. Unless you're a wealthy person who can set up various levels of trusts you can't really hide them.

You can of course disagree about what what should actually be part of a transparent public record. (Though I suspect a lot of people post-date what was generally available in a "phone book.")