Okay, so you're feeling a little persecuted here, but, objectively, whatever you think their motives might be in pointing it out, those older tags could be amended.  Then, you leave them with nothing legitimate to pick at.  People will be able to tell if they are inventing new and untrue things to accuse you of.  When in doubt, try to be beyond reproach, even if human nature sometimes makes that impossible.  Then you can hold your head up high, knowing you're in the right.