IANAL but my guess is that it costs money for the defendant to respond to a lawsuit, so if company A wants person B to stop doing something, even if person B is

IANAL but my guess is that it costs money for the defendant to respond to a lawsuit, so if company A wants person B to stop doing something, even if person B is within their legal right to do so, company A can still force person B to stop, because either person B goes bankrupt fighting it or person B ignores it and company A has the judgement in their favor.