Yuck. They carry raccoon roundworm aka baylisascaris procyonis. Read the bio-terrorism notes here: https://en.wikipedia.org/wiki/Baylisascaris_procyonis#Bioter...
> this parasite's eggs are easy to acquire, able to live for years, extremely resistant to many disinfectants, and cause serious infections in humans with poor treatment options
We have about 4-5 raccoons that visit my yard once a week or so (more in the summer). They like to defecate at the base of our trees. I usually boil a large pot of water and pour it over the poops to kill off any of the parasite eggs.