Tarantulas are risky or deadly to humans. Fact: Outside Southern Europe (where the name is worn for a wolf spider, imminent in medieval superstition as the alleged start of "tarantella" dancing), the word tarantula is most often used for the very large, furry spiders of the family Theraphosidae.
Hollywood is regularly to guilt for these 'spiders are poisonous-to-humans' reputation. Tarantulas are large, photogenic and simply handled and therefore have been very regularly used in horror and action-adventure movies.
When some "rancorous" someone is wanted to danger James Bond or Indiana Jones to invade a small city in colossal numbers, or to grow to colossal magnitude and stalk the Arizona desert for person prey, the unique-effects players calls out the tarantulas! In reality, the toxin of these prevalent-of-all-spiders commonly has very low toxicity to humans.