Some people have phobias about spiders. Little Miss Muffet who sat on a tuffet appeared to have a phobia. Maybe she just didn't want to share her curds and whey. Who knows ! She can't take all the credit for peoples' phobias though.
Many spiders are quite harmless and beautiful creatures. Each spider is different even when they are of the same specie. Take a closer look next time you see a spider DON'T TOUCH or it may just want to take a nip at you.
Check out the following external links for some poisonous spider info: