I try to talk to Witnesses. I don't live in my territory, so when they come to my door, I don't let on I'm one of them. I invite them to stay and chat. I get out a KJV and whenever they say something stupid, I look up a scripture and ask how the belief doesn't violate it. They don't come anymore, even though I welcome them back anytime, when they leave. I'm very nice to them and joke around with them. I've been offered Bible studies and accepted, but they never come back.
JWs don't want to talk about the Bible with anyone who cares about the Bible. They want to give a canned presentation and drop off magazines to apathetic church zombies. If everybody who wanted JWs to stop coming refused literature, but invited them to discuss the Bible, they'd get frustrated and go away. The vast majority of Witnesses - even old-timers, pioneers, and elders - don't know anything except how to stuff magazines in the storm doors of empty houses. Invite them to discuss the Bible as long as they want, tell them you don't read church literature because you believe church doctrine is what ruined Christianity.
It's amazing to watch the change. At first, they believe they've found a like-minded person and they're all happy. After about 5 minutes, they realize they can't preach. They realize they aren't Bible scholars and all they are is pack mules for the WTBTS. Take away their magazines and they become dumb dogs, unable to bark.
Their Bible 101 level knowledge is only enough to get them through a presentation, but not enough to actually teach anyone anything. Even if all of JW doctrine was 100% accurate, I've never met a JW who could establish much of it with the Bible. They just "know" it, because they've been told to know it. That's why when you stop attending meetings or get DFed, they say "You know it's the Truth" but if you start asking questions, they lock up and call you an apostate. You show them to be the useful idiots the Society uses them as. They're delivery boys; not ministers.