Aron makes an important point that the quirkier facets of Witness beliefs are concealed from ordinary members of the public during the initial few calls, and only unveiled once the person has received a fair amount of "conditioning" to accept more palatable teachings - hence the reason books like Revelation Climax aren't normally offered on first call. The fact that a bible study needs to trawl through 157 pages of the Bible Teach book before the Witness views on holidays and celebrations is revealed illustrates this point perfectly.
In other words.......The JW's have to set the hook first, before they start to reel in the sucker fish, or it is more likely to free itself. Of course, we all know and were taught this, when bringing new people into this cult.