I know this may start controversy but it's not oppressed if they don't know they're oppressed. But if being abused then let them free yes, but on the terms of being oppressed then no.
Mr. Walter Cunningham and a cluster of his companions have all gone to the prison to attempt to lynch Tom Robinson before his trial. They are beginning to undermine Atticus to attempt to get him off the beaten path when Jem and Scout arrive. Scout diffuses the energy of the posse without realizing that she is doing it.