The idea that it's unacceptable to criticise the culture of an area, and that people need to be protected from this idea, would be unthinkable on Startup News.
Reflecting on it, the way dang and others handle these things is right, if you have a point, you can make it without making an insulting generalization and characterization.
If you don't, at the end of the day, whatever point you try to make is wiped by the visceral response.
Removing all color from speech makes the world a very boring place.
Criticising bay area culture is not a 'slur' and saying that is more inflammatory than the original statement.
The rest of the internet figured out long ago that such behavior is actually pretty toxic, and is called "sealioning" [0][1]
[0] http://wondermark.com/1k62/
[1] footnotes. It's all civil if you have footnotes.