yup there are subtler ways to go about it from putting perishables where they dont belong, to encoraging vermin to move into a place their not wanted the idea is to slow down production passively if they cant convine because the place is being fumigated for the 90th time in a row they are likely to just demolish the building and build a new one bounus if its the politicans house and not the place of work that gets it. be a bit creative after all rats are easy to get and breed fast but wont infest a place if its recently been bombed with poison.