I visited it recently, and the entire Lake area has become gentrified. Almost like an entirely new city, with lots of people out at night. And I wasn't too worried about being robbed. Of course, I was robbed at gunpoint just a few years ago walking home from work in Redwood City - so it just goes to show it can happen almost anywhere. Except, of course, Singapore. Gotta be the safest city in the world.
Unless things have improved a lot in the last fifteen years, it's really pretty easy for a tourist inclined to walk between touristy areas in Oakland to wander into an unsafe area. I wouldn't blame that on stupidity, it's not as if the city puts warning signs up.
Maybe you don't know what the feeling is like? I mean, how long have you lived in Oakland? If you grew up in the city with the 3rd highest crime rate in the US, maybe your barometer isn't calibrated the best?
"There is at least one HN account, used by at least one person, who claims to believe he went to Spain and did not get robbed."