Anything I've thought of so far always ends in "and then the underpaid delivery guy gets fired and starves to death" or "and then the person packing the boxes has their wages cut"
Are there methods here that actually just harm the COMPANY not the people who happen to work there?
Right. It's hard to fight the power individually. The leadership is insulated from consequences. They thought about how to protect the operation at all costs first, and about consumers second. Whatever you steal is likely insured.
Getting a law degree might be one way to give yourself a means to fight them alone, but that's a devil's bargain.
Otherwise, taking them down is a perk of victory rather than a means of getting to victory.