I think it's rude to knock on someone's door and invade someone's personal space to preach about their religion. I am an athiest, could you imagine knocking on people's doors or preaching in the street that God doesn't exist!
But you'd be doing it to push your opinions on others for no reason other than because you want to, JW's believe to be faithful God wants them to spread the word, they're not doing it to be antagonising or self-righteous they believe it is their duty, so no I don't think what they are doing is rude, misplaced perhaps from someone who isn't a JW but I couldn't be angry at them about it, just as I wouldn't be angry at a Muslim woman for covering themselves or a Jew not eating pork, it's their belief system. If people find it that annoying you should put a sign on your door, if they ignore it then you have a right to be annoyed. I don't class knocking on someone's door as "invading your personal space" you don't have to answer.
I completely class it as invading my personal space! They're knocking on MY door! They shouldn't be doing that. If they want to spread the word then they should arrange seminars and what not at local community halls or their churches were people can voluntarily go to..... I'd hate it just as much if any one of any religion came to my door to preach.... why is it only JW that it?.... The fact that muslim women cover themselves and Jewish people don't eat pork doesn't come in to this. They are not coming round to my house to tell me why they do it.
Me being an athiest is just as much a belief as them being JW, I have my legitimate reasons for it that not everyone will agree with, just like they do have theirs. I'm sure they would be very offended if I went round to their house to tell them whythey shouldn't believe in a god, just as I am offended when they come round to my house;.
You're misunderstanding their intentions and religion, Muslims and Jews don't do it because it isn't part of their religion, preaching is part of their religion they don't individually do it because they personally think it's a good idea they believe they have to do it, just as people pray, being an atheist isn't a religion, it's a valid belief system but you can not compare your views with the actions of JWs it's completely different, anything you do as an atheist is a personal decision, people are taking it too personally. Put a sign on your door, but don't take a personal dislike to their character for something that is a worldwide religion that they are taught to do, or at the very least understand they are not trying to be rude, certainly not offensive.