Trick-or-treating strategists often take into account the homes with the best loot. Thus, Zillow has compiled its sixth annual list of the top U.S. cities for trick-or-treaters for the most candy on the safest streets. San Francisco won the top title for the fourth year in a row. This four-bedroom home is listed for $3,495,000 in San Francisco. Zillow included factors such as crime data, population density and "walk score" so families can get the most candy in the least amount of time.