The stolen documents served to illustrate that there's a big difference between what the public thinks the FBI does and what they actually do:
"According to its analysis of the documents in this FBI office, 1 percent were devoted to organized crime, mostly gambling; 30 percent were "manuals, routine forms, and similar procedural matter"; 40 percent were devoted to political surveillance and the like, including two cases involving right-wing groups, ten concerning immigrants, and over 200 on left or liberal groups. Another 14 percent of the documents concerned draft resistance and "leaving the military without government permission." The remainder concerned bank robberies, murder, rape, and interstate theft."
https://www.jwz.org/xscreensaver/screenshots/