...then it's pretty much impossible to convince them with actual arguments, so you might as well use other means. You're never going to be able to convince people who put their fingers in their ears and say "Lalala I can't hear you!", but it seems like it should be possible to have some impact on people who will at least listen.
"One horse-laugh is worth ten thousand syllogisms. It is not only more effective; it is also vastly more intelligent." - H.L. Mencken.
These are written from the angle that Christians deconverting is bad.
Cognitive reasons
Breaking up because a relationship with God becomes unworkable
Leaving because other Christians aren't empathetic about doubt
At what age do people leave?
It looks as though there may be more articles in the series.