[paranoidrobot]

> How is a reminder of the law a legal threat?

In the same way that "This is a nice place you've got here, it'd be a real shame if something were to happen to it", when spoken by a Mafia enforcer is most definitely a threat.

It's not, outright, threatening to bring a lawsuit, however the language of that last paragraph is definitely something which you'd expect to see from a lawyer in preparation for such legal action.

[southerntofu]

I'm not a lawyer, and i've both sent and received email like that over the years, none of which ever produced a legal action. That's standard procedure for private data requests.