"At least in this city, their claim to be the only ones preaching - or indeed to be preaching at all - seems utterly absurd."
Where I lived preaching was confined to just a few streets around the book study group areas , which would get done every few weeks at the same time of day.Most areas were hardly touched and no one did not at homes.
I think most other religious groups who preach tend to focous on were people are rather than going door to door.