I've never understood why anyone would think this would matter. Like they're camping in our neighborhood for the week and this saves everyone money somehow?
Or the other tactic where they say "you might have noticed my truck around as I've done some work for <neighbor> and will be at <other neighbor>'s house later..."
They name people whose door they knocked on, got their name, and likely rejected. But they use those names on other prospects which makes it sound like word of mouth, the best form of advertising! "Oh, if my neighbor is using this guy for <Service> he must be good"... Really a brilliant tactic that I bet fools some people.
The only guy I really admired (but didn't use because I thought his prices were far too high) was a guy going door to door offering to clean the outside windows. He wanted $10/window and I was like no way. I'm sure he got a few customers.