I agree with the majority, and wonder why you even thought otherwise. Maybe you meant insincerely rather than nicely.
And I feel no duty to people coming to my door to help them use their time more efficiently by getting them along to the next door where they might find a customer. I enjoy the discussions just like I enjoy them here on RF, where the chances of my converting approach zero.
The last time that happened, something unexpected occurred. They're a very nihilistic and pessimistic people, but I'm not. They began by noting how the world is going to hell in a basket, which I guess they supposed was a given and obvious to everybody. I disagreed and noted that never in life had never been so good for so many. They didn't disagree. They just gave up and moved on. Imagine being rejected by the Jehovah's Witnesses without rejecting them first.
I had a similar experience here on RF with a JW when I gave her that answer (somebody once a prolific creationist poster here, but now not seen in years). She was offended that I could be happy in a world where so many were unhappy. She called me selfish. I assumed that she got that from her elders.
That's a good way to chase them off, but that's not my purpose.
Here in Mexico, it's common to see "Este Hogar es Catolico" with a picture of the Virgin of Guadalupe (same virgin as the Virgin of Zapopan - they're all Mary) outside a residence to keep the Testigos (Witnesses) away. Even non-Catholics use them. I know some:
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We keep an image of the Virgin visible without the sign outside our home. Thieves are less likely to enter.
The English translation is such a polite euphemism for the Spanish there.