[mothered]

But, look at the people who penetrated the Sony servers - they got away even when the FBI used all of their resources on attempting to trace them.

Yes, I definitely agree that It's extremely difficult, In not sometimes just about Impossible to trace with the methodologies I've mentioned above.

That said, there's still an element that may provide a minuscule piece of data which can lead to part or all of one's Identity. I do use the term "may"- nothing Is guaranteed either way.