Get them to think.
Do you have loved ones? Friends? Stuck in the cult?
Get them to think.
And remember, the history of the world is littered with people who go through some, most, or even all of their lives without thinking. If they don't think now, it doesn't mean they won't think at some point.
So the attack is like water on rock, small ideas pounding on something that appears impenetrible, but in reality, is slowly giving ground to the natural forces against it, forces that will ultimately bring them down,.
But bringing down the borg becomes nothing more then an exercise in Ahab chasing the whale if you only think of it as revenge. The best thing that can happen is that for those who are willing, they think, and live the lives that they choose.
It's not about the borg. It's about the people inside. You won't get all of them, esp those who don't want to think. But for those that do, help them. Don't make it too personal, but give them some facts and ideas.
Ideas represent the best chance for that to happen.