Not to be offensive or anything, but for quite a lot of people, that's the extent of knowledge they have of "Africa" as a concept. Even ones that do know, they essentially clump all the individual countries into one bucket, and use that for basing their assumptions/opinions. It's gotten better over the years, but I've also gotten used to it. Also, I do my best to correct any misconceptions they have about the place I've called home for quite a bit of my life.