Well, you can always plant the seed. Remember the parable of the sower. It can apply to hearing the Word of God, but it can also apply to other ideas as well.
Agree in principle
I used to be the guy who would long post and destroy ludicrous pulp cultural narratives with enough proofs and citations to demonstrate to those with any sort of intellectual honesty that they had been lied to and had drunk deep of the lies.
I also have presented similar arguments in person on rather a lot of occasions and while occasionally some might admit that maybe the facts were on my side, their feelings would not change. Had some relationships ruined as a result. To be frank, people's insistence on sticking doggedly to what seems like transparent hucksterisms and grifts to the point of delusion has rather put me off the pursuit.
So I have backed off.
Before I was a dad, I was just about infatigeuable on debate and argument but as just about a grumpy bastard, it did not make for a long trip to being bitter. Now however I am quite literally a different man and have a duty to my son to have a really good attitude and free of bitterness. My focus is on what I can effect and I don't bother to beat drums that much.
Besides...I have been planting a seed or two here with none to subtle references to bad times coming. With the hope that some of those seeds sprouting. Doing my group selected best/duty.