OK, here are answers to my little pop quiz.
#1, 4 and 6 are Filipino superstitions.
#2, 3, and 5 are English superstitions or old wives tales.
#7 is actually true, in a way. Opium is derived from poppy seeds, and you can fail a drug test after ingesting too many poppy seeds (as in a poppy seed bagel, like Elaine on Seinfeld did!) This website found a record of a young man actually dying from consuming poppy seed tea. Urban legend? I don't know.
What else is true? Graham INSISTS #2 is true and his parents INSIST #3 is true but I have actually read food articles by nutritionists/pediatricians stating that OJ, crackers and cheese are a good bedtime snack for kids. I myself have eaten all 3 foods near bedtime with no adverse effects. So go figure.