I am not so sure about harm to children from this stuff. I grew up with the same teachings and same scary pictures in the Paradise book as everyone did . It never affected me at all.
Kids love violence… it does not seem real. We had the cartoon characters doing “ Bam, Splat, Your Gone” and it was funny. The nursery rhymes and fairy stories had violent themes. I recall looking at my nieces book of Raold Dahl ( Sp?) horrible stories, just the same.
To me , somehow all the WT stuff seemed much the same when I was that young . The good people survive and the baddies get their come-uppance so all is well..
That is how my very young mind saw it anyway. It was when I was older that I started to see the terrible side of the message.