I don't know what definition of revenge everyone is using, but if revenge means consequences for the perpetrator, then it could help the victim by sending a message to future perpetrators.
If I understand right, some people consider that justice is a form of revenge. If the process of administering justice is done by a legitimate third-party, which lets the victim focus on healing/repairing, then I agree that justice will help the victim.
If A's revenge took the form of damaging B's car (not while anyone was in it) and costing thousands of dollars in repairs... Well, it would depend on just what B had done to A, and what alternatives A had. But if B had previously inflicted the same magnitude of economic damage on A, and perhaps gloated that there was no way for A to prove it, then... I think the main thing I'd feel for A is respect.