They have a lot to overcome. Almost everyone on this board has already been a JW. We're just the tip of the iceberg.
Several years ago, a JW lady knocked on our door. My daughter told her directly, "Oh, I've already been a Jehovah's witness." To our surprise, this forthright statement only made her curious, not disgusted. She actually came back, but we were going somewhere and didn't have time to spend with her. Shortly after that, we moved to another state.
Recently, two JW's came to our front door. I told them that I was an apostate. They did not flinch, but the lady in front kept blathering about "the solution." She said, "You're not disfellowshipped, are you?" As far as I know, I was not formally disfellowshipped, so I told her this. The lady with her seemed somewhat uncomfortable, but said nothing.
Almost everybody knows a JW -- from work or from family mostly. Knowing a JW personally is usually all it takes to get people disinterested in their "message," that you cannot have any fun, and the world is on the verge of a cataclysm in which Jehovah will make Hitler look like a little old lady Sunday school teacher.
Regards,
SandraC