[kube-system]

If it was a malicious attempt to chill speech, why is it one letter sent to some rando on Twitter? Unless we see more people coming forward with the same experience, I’m more inclined to presume that this is more simply just a isolated instance of a whacky person posting whacky shit.

[greyface-]

In the replies, other people are expressing that this happened to them, too. Here's one example: https://twitter.com/_the__snowflake/status/15427023930617774...

[kube-system]

That link is dead for me.

[greyface-]

Looks like the chilling effects are working. Here's an archived copy: https://archive.ph/aPlL5

[kube-system]

It’s a photo of two business cards. I don’t see a letter or any claim of what it was about, let alone an accusation of misconduct.

The most obvious explanation here is that the guy made an illegal threat and the feds showed up to check out whether it was legitimate. That’s completely normal and legal, and not even refuted by anything at that link.