Having worked with a troop of wild baboons for two years, as well as working with baboons in a wildlife rehabilitation environment, I will say the following: I seriously challenge the information in some of the posts in this thread. In the time I worked with baboons, I have never even remotely been close to being attacked, nor have I even felt threatened, nor has anyone else I know been attacked or threatened, and these are people who have spent months on end, traveling with baboon troops. That is not to say humans aren't attacked by baboons, it does happen, but not all that frequently. With a little bit of reading, one can get a good idea of why baboons do what they do. If anyone really wants a good in-depth read on baboons, I recommend a book by Dr. Shirley Strum titled: "Almost Human - A Journey Into the World of Baboons". This woman has been studying baboons since the 1970s, and her book is one of the best sources for an introduction to baboons. Or you can wait for my book to come out, but that's probably a year or two away.
Cheers!