Silly string is banned in Hollywood on Halloween.
If you’re celebrating Halloween in Hollywood, then be sure to leave your silly string at home. In 2004, the city passed an ordinance that banned silly string from the area on that day. If you’re caught with silly string between 12 a.m. on October 31 and 12 p.m. on November 1, you might find yourself with a $1,000 fine.
Along with being bad for the environment and a nuisance to clean up, the ordinance also claims that silly string “may cause pedestrians and police officers on horseback or motorcycles to slip and fall.”