I for one support your idea, snakeface. I have been thinking of doing the same once I am out of the organization (I can't give an anti-witness where people know me, for family reasons). It's worth it if it helps the occasional person who might have gotten drawn in. That being said, very few people are being drawn in these days, so it's hard to say how many people you might have to talk to before you reach one who was studying with, or vulnerable to, the Witnesses.
Then again, an educated friend or family member can also save someone who is interested in the JW religion, so when you factor in social connections, it raises the odds that someone will be helped. We've all experienced as JWs that situation where someone at the door showed interest and then abruptly changed their mind before we visited them again, and we knew it was because someone 'got to them' -- a family member or friend, spurred on by Satan no doubt Well, how did that person know to warn their relative/friend? We can be the ones to provide a warning that is passed on to that person.
As far as apathy goes, I think that the story of an ex-JW will be much more interesting to them than any JWs that ever came to their door. Personally, I have tried anonymously blanketing a street with TTATT leaflets through the mail, but it's hard to know how much good they will do. It's better to speak to people in person so they can hear your story. But as far as the leaflets go, I would suggest using a non-religious one unless the community is religious and close enough to that denomination. Otherwise it might make the householder feel like they're stuck between two people bickering. I like the secular approach used by the one on JWfacts: http://jwfacts.com/watchtower/pamphlet.php