We have JW's a few doors up, whose members turn up every Saturday and Sunday mornings at their house... then go door-knocking. For a while, I tolerated it - after all, it takes all sorts to make the world go round, and we do live in the same street - and then... I got fed up with politely trying to get rid of them.
So I pointed out to them (for the nth time, and very politely) that I'm Jewish, that their religion poached from not only mine, but a fair few others, and that if they really wanted to argue theology with me, they'd lose.
I'm now, very happily, on the Don't Knock List.
Every now and then, we get new members who don't know, knocking, but a polite "yeah, Jewish household!" works wonders. I can even ignore the sideways glares from the neighbours.
(And I really am Jewish, before anyone takes me to task!)