The visual contrast in this picture is high, but I suspect the chances of success are low.
Some people share their faith on the other side of the door when they hand out candy to Trick-Or-Treaters. Here's an fictionalized example of what I'm talking about:
Yes, I'll be handing out tracts with the candy, too! But not the Chick tracts. And only to the teens and parents. Great opportunity to share our faith and perhaps plant a seed.
If they're too little, they're not likely to grasp the whole concept of the law and the gospel. The tracts I give out go through the law first, then the gospel. If a person doesn't know that he is sick, he's not going to want the cure.