What term describes the practice of refusing to work with goods sourced from companies deemed unethical?

The term that accurately describes the practice of refusing to work with goods sourced from companies deemed unethical is "blacking." This term specifically refers to a form of protest where workers, often in unions, refuse to handle goods or materials from a particular company as a way to signal disapproval of that company's labor practices, environmental policies, or other ethical concerns. By blacking goods, workers aim to apply economic pressure on the company to change its practices, thereby advocating for more ethical standards in business operations.

The other options do not fit this definition as precisely. "Work to rule" involves employees strictly adhering to the conditions of their employment contracts without doing any extra work, which may not explicitly involve refusing to handle unethical goods. "Sit in" refers to a form of protest where individuals occupy a space to demonstrate against a policy or company practices, but it does not directly relate to the refusal to work with certain goods. "Picketing" involves standing outside a location to protest, typically to draw attention to a cause, but it also does not explicitly involve refusing to handle specific goods.