How many JWs have small children?,,5 yrs old and under?,, maybe 10%..most parents,(JW & non-JW), don't want their kids to have warlike toys, so would include a warlock (black art/sorcerer shows in my dictionary). Though, 'Sparlock' was more innocent looking, with just the 'magic' emphasis. Since there is plenty array of toys, most JWs will try for positive/innocent/learning toys. However, most will have no conscience problem with Mickey Mouse (though has that one movie playing a Sorcerer) and Tinkerbell and Disneyland.
Many JWs and most JWs kids are learning to draw 'their own' line little by little, issue by issue. The youth gradually learn to double life with most eventually leaving.
There does develop two classes of JWs; the liberal (growing majority) and conservative (mostly aging). A horrible religion for the children.