Except in certain limited areas (e.g. “the reasonable doctor” standard for medical malpractice), the standard is the “reasonable person,” not the “reasonable person skilled in the art.”

People on HN are not representative, because they know about computer security and HTTP access codes. We don’t live in a world where those people get to make the rules. We live in a world where the rules are set by reference to ordinary people. My mom gets to set the rules for what’s “reasonable” (what are the social norms everyone has to follow). Not you or me.

My point is that a reasonable layman would assume that if a document was not linked or indexed from a public portion of the site, it was not meant to be accessed. That makes sense, because if the document was meant to be accessed, it would be made accessible in a way a reasonable lay person would know how to access it.