They aren't scary odeon, they are tiny little beetles, a few mm long, that do not bite people, and apparently 'look superficially like spiders' (looking at a few pics they look nothing of the sort, and besides, like any other beetle they have six legs, whereas all arachnids, be they spiders, scorpions, ticks, whipscorpions. solifugids or theresa may's mother, have 8.
Spider beetles, according to one of the first sites in the search results are no more than 3-4mm long, and they feed not as predators but are omnivorous scavengers. You or IQ probably wouldn't notice even if someone were to drop a few down the back of your shirt neck, at least just so long as the beetle-dropper didn't run off and/or start laughing in a suspicious manner.