The post here on hacker news mentioned the down sides for one receiver. That person was stressed out thinking that they were about to be sued. They considered retaining council, which could have cost them a few thousand dollars, in order to get ahead of the threat. It didn’t come to that, so it’s a “what if”, but I could see myself trying to retain council too. Hopefully, a lawyer would have talked me down and advised me to wait it out. On the flip side, they may have offered to respond on my behalf (which would cost money).

I would not respond to such an email myself, ignoring it until I was able to defer to an attorney.

I publish a simple personal blog and I worry about the _worldwide_ legal implications of doing so. As one example, I have some old information about making model rocket fuel at home. At the time I had carefully reviewed U.S. law and knew how much I could legally make and have in my possession. Then I got questions from people in other countries and I got spooked. What if I break a law somewhere else?