ignoring the juvenile ......
If you would rather they didn't show up even after being a do not call I suggest you write NY and ask them if they would please honor the do not call! Yeah I know, it will get them in trouble but..... it might show jw's like our new friend Mark that it is indeed a cult when these two are marked for disobeying orders. There will be repercussions from knocking on a do not call door, I know this from personal experience.
If they are diehard jw's they must be willing to walk the line, that includes taking the punishment. After all, it is only done out of love right? when the cong has to treat them like shit for a reason they will never know, they can feel the love of the society in which they live.