Ther's no simple solution to that problem alas
This. It's extremely complicated really.
One thing that *could* work is to allow authors to make comments on reviews. So they might say "Hey, I fixed this in version X". There is no guarantee that that's true of course. But a person interested in the hack could read that and decide for themselves if they want to trust that claim or not. Since reviews are by default not visible, reviews with comments should get a visible marker. Say instead of Recommended yes or no it could say yes* or no* if there is a comment. So the visitor who knows what that means may want to take a closer look.
But even this still has lot's of downsides:
- Authors could potentially argue and haggle with reviewers
- Most users have trouble understanding most of the site, the percentage of users that understands what a * next to the recommendation means would probably be extremely small...
Any solution involving removing old reviews is unlikely to be implemented because judging if a deletion request was justified or not requires a staff member to have intimate knowledge fo the hack in question and that would take way too much time to obtain.