I can't help it, but I'm superstitious about sports. During the 2009 World Series, I had to drink my favorite beer in a bottle even when it was on-tap; I drank bottled beer and sat in a chair that was partially broken at the same bar to make sure that my team would win. If I had a draft or went somewhere nicer? They were screwed.
So it rings a bell with me when someone offers some small potential proof that a team's luck is changed for the better or worse by something I can do.
This nugget comes from GrubHub, an internet purveyor of delivered meals, who did some analysis of its sales data to help prove the value of my superstitions.