Neither the legitimacy of the article nor that of the users' flags is in question. The flags merely draw attention to the fact that the voting was obviously ill

Neither the legitimacy of the article nor that of the users' flags is in question. The flags merely draw attention to the fact that the voting was obviously illegitimate. IOW, the attacker drew attention to the attack only, and the article is flagged because of the attack, but the flagging itself is proper. So the attack caused the proper response of flagging. Not all that impressive. Preventing an illegitimate article composed entirely of Lorem Ipsum from being flagged off the front page would be impressive.