NOTE to OP: There is no way in Hell that there were 10 tarantulas walking across a ceiling!! Those were just spiders. Tarantulas are very solitary creatures.
PLEASE do NOT Kill Them...Put a wastebasket over them, slide a paper or folder under and take it outside. Along with snakes they are part of Nature's Clean Up Squad. They eat lots of pests.
As for centipedes, oh Yeah! Squoosh them to death. No, do not think that dead they can't bite, it is a reaction. HOWEVER, like most of our nasties (Black Widow Spiders, Centipedes and Scorpions) these creatures like dark, dank places (like your shoes or dirty clothes piles) Black Widows like solid structures, dark places, like wood piles, underground registers, places like that.
Just be careful..It is their country after all.
HB