I don't care why he took it home. The article clearly states it was improper for him to take it home. That means either ill intent or gross stupidity/negligence/incompetence. There is no good explaination for taking it home.
Because of this person's actions, I have to put a fraud alert on my credit bureaus and monitor them for the rest of my life.
These names can be sold to illegals who want fake ID. Am I alarmist? A little. I worked as a mortgage broker for 4 years, and those people whose ID's had been stolen lost years of their lives trying to repair the damage to their names and finances.
Or to people who want to ram airplanes into buildings. Or hijack school buses. Or any other type of terrorist mischeif.