different research assistant approached this separate group of residents two weeks prior to this burdensome request and asked them if they’d be willing to display a very small, relatively inconspicuous sign in their window that read BE A SAFE DRIVER. Because it was such a small request, almost all of these residents agreed. Two weeks later, when someone else came to their home and asked them if they’d be willing to place the large billboard on their otherwise perfectly manicured lawn, they were much more inclined to agree