I have gone out in service several dozen times this year ... I have either manipulated it to go on calls with someone or I fake that I ring a doorbell when I am at a door with someone. If I do get someone home or someone outside and they do take literature (I have no idea WHY they do with my lame-ass presentations nowadays), I never go back and I make up an excuse that I went back some other time and they weren't interested.
It is all some of us can do until the time is right (strategically speaking, of course). I have already (and I'm sure many others have) began to be more open about my disdain for service. I make little jokes that even the so-called "hardcore" JWs make about field service (because they do). I just make them a little more often now, and get them to be a bit more vocal about it - that way when my choice is made public it will cause them to look at themselves.
Will it help get them out? Probably not. But even if I can get one to stop and think ...
-ithinkisee