"Is a typical coyote a danger to a full-grown man?"
If you're not armed or have a good stick one can cut you up pretty good.
3 can take you down and feed on you.
are also rabies carriers like coon, even farm animals can get rabies...one year rabies was bad in my area and they found a calf and a horse with rabies....dumb people should kill them like our ancestors did...that goes for wolves that come near human habitat