Sure, one thing you can do is disrupt the specific people doing something bad. But that's pretty rare. As MLK explains, the point is to create a more general disruption so that everyone has to take notice of an issue they might otherwise ignore:
"Nonviolent direct action seeks to create such a crisis and foster such a tension that a community which has constantly refused to negotiate is forced to confront the issue. It seeks so to dramatize the issue that it can no longer be ignored."
From his "Letter from a Birmingham Jail": https://www.africa.upenn.edu/Articles_Gen/Letter_Birmingham....
The whole thing is worth reading. In particular, this bit always wakes me up: "I must confess that over the past few years I have been gravely disappointed with the white moderate. I have almost reached the regrettable conclusion that the Negro's great stumbling block in his stride toward freedom is not the White Citizen's Counciler or the Ku Klux Klanner, but the white moderate, who is more devoted to 'order' than to justice; who prefers a negative peace which is the absence of tension to a positive peace which is the presence of justice; who constantly says: 'I agree with you in the goal you seek, but I cannot agree with your methods of direct action'; who paternalistically believes he can set the timetable for another man's freedom; who lives by a mythical concept of time and who constantly advises the Negro to wait for a'"more convenient season.' Shallow understanding from people of good will is more frustrating than absolute misunderstanding from people of ill will."