I remember when I lived there, they had to get a special exemption to use self-checkout machines made by 3M in the Berkeley library. I don't remember why 3M ended up on the bad boy list, probably something related to nuclear weapons though.
"The Peace and Justice Commission finds that it would violate the Nuclear Free Berkeley Act (NFBA) to approve a waiver of the law and contract with 3M Corporation for maintenance of the Library’s RFID system."
"Pursuant to B.M.C. Section 12.90.070, the City of Berkeley shall grant no contract to any person or business, which knowingly engages in work for nuclear weapons."