most of the owners say to get out just when then ask for permission/introduction(no digging involved).If they want to ask for permission they sure have to get in to their property,right?then why this question
People don't like being bothered by grabby needy people.
They answer the door thinking it's something important and its just another sleazy salesman.
There is just a dislike of predatory commercialism in general.
If he was asking for directions or to recover a ball, or call the police or something like that, the outcome would be different.
As soon as you realize they are trying to sell something, recruit for a religion, or want something of yours, or want to change you or your opinion on something, attitude changes to defensive and GTFO.
If I wanted a fucking bible for example, Ill go to church and ask for one. Leave me alone otherwise.
Door to door solicitation in general is just viewed as rude. People's negative response to unwanted solicitation at their door is no different from throwing junk mail or spam into the trash on principle without even looking at it or before you even get back inside.
Ads, spam, solicitation, etc, is in your face and predatory feeling, so people get in your face right back. Knocking on your door for shit you don't care about is basically old school spam, like a giant real life pop up window covering what you were reading and scrolling with you to block the page. But its worse because you can't just close that page and say "screw those guys, never going there again". Its AT YOUR HOUSE. Your safe place, your escape from all the bullshit you hate in the world, where everything goes perfect your way, and yet ... here it is: the world invading your home where you can't just close the browser and retreat.
Ever deleted spam and felt irritated? Ads ever ruined your browsing experience, like causing the page to hang while loading shit you don't even care about? Same thing when someone is knocking on your door, only worse.
Even worse because you may have been busy, stuck under a car working on it, and you had to get out, wash your hands, take off your geasy shoes, and answer the door, and THIS is what its for? FU.