alt Hacker NewsAs a native English speaker, I interpret it as “you the reader”. Or maybe I should say, I don’t intuit any material difference between “you the reader” and “any given reader” or “one”. I think your original comment is a good critique of the headline.
Doesn't have to be the reader, in general "you" would not know who it refers to specifically because it really mean anyone sharing the same experience. (see what I tried to do here?) One would probably have encountered those constructions while reading though ;). Never heard 'One' in colloquial English.