Self-awareness is important ^.^
Sorry, I don't mean to snip, that's intended entirely tongue in cheek, I promise.
There have been surface drow out in the world and intermingling with other folks for several generations or more, including entire drow-predominate settlements. The majority of drow culture and society is and remains in the underdark, but there are plenty of drow out and about in the world, just as any other race. Most surface drow have deliberately broken away from traditional drow society, or were not raised in it, but there remains often a strong element of distrust levelled at unfamiliar drow regardless; underdark drow only come tothe surface for dark ends, in most cases, and knowledge of how destructive and terrible underdark drow fully inured in their culture are and can be is prevalent... and thus, since there's no visible way to know on sight whether a drow is an underdark spy or a regular citizen - just the same as any other people in the world - many drow face a certain degree of mistrust when entering new settlements or meeting new people, and it's an important part of the struggle of stepping away from such a controlling culture, and choosing to be better.
No, the whole
"I'm not an evil nasty drow so I look different and am prettier and don't have the red evil eyes that they all have, so you can identify me as a good person on sight!" is not cannon, and it undermines a large part of the importance of the choice that surface drow make.
