In general federal judges' home addresses are never reported. It's common that upon being appointed a new judge buys a home somewhere else and moves ~ without filing a forwarding order.
They have REAL enemies ~ folks they send to prison for many years, or whose businesses they destroy (e.g. as in a bankruptcy).
The fact Turner had this information available suggests there's an ongoing and organized effort to conduct surveillance on federal judges (at least those in Chicago).
I suspect allowing Fitzgerald to make the public announcement on this was a serious mistake by DOJ. He probably doesn't understand what Turner is really being charged with well enough to enunciate it, and Fur Shur Fitzgerald has a difficult time identifying the correct targets in criminal investigations ~ we shall see, though.
An ambiguous hint at worst. I could buy endangering, but not threatening.
You say that like it's a bad thing.