First, was there a No Trespassing sign displayed prominently on the property? If there was, the witlesses shouldn't have been there at all--especially if they were warned about it before. And, a note should have been written on the territory card "Do not call [address]--person indicated clearly that they do not want us there" and left there until it is obvious that the person moved out. And, then it should be honored forever unless the person at the house actually wants to contact the witlesses. The Kingdumb Hell is usually quite easy to find in the phone book, and they can call them there quite easily.
If the witlesses were also distorting the issue, shame on them. First, it doesn't appear that they fired any shots. Only a "Get off my property, or face the consequences" warning was issued. (Which, in some states, would be legal if a No Trespassing sign was prominently displayed). This also appears that they were only reporting part of the story--the part where it appears that the witlesses were minding their own business when they were threatened with getting shot. Fact is, the witlesses were not minding their own business--they were trying to coerce others to join under threat of getting destroyed soon. This person may well have had more exposure to the witlesses that led to his tolerance for the scam exceeded.
I hope the witlesses learn their lesson. First, if a No Trespassing sign is displayed (or a No Religious Solicitation sign), respect it. If a person makes it clear that they do not want the witlesses at their door, that note should be placed in the territory. Such note never goes out of date, given how easy it is for the person to find the Kingdumb Hell and contact the witlesses if they ever change their minds. No yearly visits need ever be made, and shouldn't because doing so could pxxx the householder off and would constitute coercing them into accepting the scam.