joseph: This sentence: Even assuming the stories were true, which is an assumption, it could well be they weren’t aware of the origins or history of All Hollows Day and Halloween.
R’ Yaakov and Rav Pam were both well versed in these areas. If you want to go to an extreme for yourself, and not give out candy, kol hakovod. My Rosh Yeshiva stated outright that one can give candy to the children who come to your door on Halloween.