As Christians we are tempted to make unnecessary concessions to those outside the faith. We give in too much. Now, I don't mean that we should run the risk of making a nuisance of ourselves by witnessing at improper times, but there comes a time when we must show that we disagree.
Retarded kids are the best. When they ask for an autograph I just fake sign a picture and tell them that it's in invisible ink and it will show up later. They totally buy it. It saves me a fortune in markers.