Instead of trick or treat, how about treatment or control? We conducted two new studies on my porch this year for Halloween. Unfortunately, the mayor of New Haven recommended that people delay trick-or-treating post-Sandy even though the neighborhood was in good shape. This caused lots of confusion, and a turnout of half of the normal turnout of 600 or so kids. So sample size is down, standard errors up.
Alas, two nice results. Both written up in one-page one-graph papers.