The Sunday service was about to begin at Miami's Palmetto Presbyterian Church, and the Rev. Neil Wyrick stood, as usual, on a balcony overlooking the parking lot. Below him, pencils and Polaroid cameras at the ready, were what he calls his "spies." As the congregation began to arrive the pastor suddenly pointed to a sunburned, middle-aged couple climbing out of a new, blue Thunderbird. One of the spies hurried over and began to write down their names, addresses and church affiliation on a printed form. While he was questioning them, another spy snapped a picture.
As the same couple were leaving Palmetto...