http://www.cockeyed.com/archive/candy_code/candy_code.html

Sacramento kids developed a hobo-esque code for Halloween, leaving chalk symbols on the sidewalks outside houses to indicate positive or negative candy information. Use these markings to watch out for cheek pinchers and mean dogs. If you’re lucky, you’ll get full-size candy bars or (like the pic included) an OPEN PORCH BOWL.

Lindsey Weber BuzzFeed Staff posted about 3 years ago