Sometimes people will become disturbed, no matter how we deal with them, because they are already disturbed! Our mere presence is a threat to their sense gratification, especially when we expose how much people have exploited religious practices to justify their own sense gratification. So we should not be intimidated by their disturbance. However, if we don't provoke them by restraining from strong preaching, and by that tactic they willingly take a book, that is much better, than provoking them, and they end up walking away emptyhanded.
Collected Letters: Volume 2 Preaching and Book Distribution