Confrontation. This may be you approaching a jw at a cart.
Jws have as matter of policy approached people at their doors, in the streets all the time, they are used to it, it can be done, if you are unknown to them in subtle ways. example
On a resort Island approached a cart cherub, and said I have a bible question for you: Cain and Abel, what did Abel do with the leftover meat from the sacrifice-- answer: "discarded it."--" the dump perhaps?" -- "nn--jeah" " where the meat always went, because nobody even the dogs would eat it?" food -meat- for thought. hopefully.