WT's anti messages are usually of the velvet glove kind. Their messages are dots that the audience joins in their own mind. Anyone who is a fan of the horrormovie genre will know how implied threat and menacing music can be more effective in elicting fear than a big scary ghost in full view.
They don't actually come out and say the words you're gonna die horribly if you don't serve Jehovah either but we know by the scriptures used as reference that that is exactly the message. The brain makes the connection even if the conscious mind glosses over it.
People that grew up listening to those "soft" trauma messages can still have nightmares about it as grown adults.
I don't underestimate the cumulative effect these messages have over say a twenty year period from birth to adult hood, they really do get in and cause long term damage to the way people think.