Earlier quoted context omitted.
I don't understand why you reacted so strongly. I feel like it's not a big deal to receive a message like that; what am I missing?
I'm just running a hobby website. I'm not at all used to receiving letters that bring up legal questions, then give me a time frame to reply as per a specific law. To my non-lawyer reading, that looks like someone's doing their homework to figure out how to drag me into court. Judging from a lot of the responses I've gotten from other recipients, I'm far from the only one.
You're not supposed to have anxiety attacks over fairly lame sounding emails. Not to mention, it's just a matter of time before you get another (spam/scam) email like this.
I get these quite frequently? I don't know how often, but definitely at least one a month. Either it's about my taxes not filed or my student debt, or some loan I didn't pay.
Not worth having anxiety attacks over, minor or otherwise.