Legal Question in Intellectual Property in California

As the subject matter being protected grows more nebulous and ill-defined, writing and enforcing such agreements becomes more difficult. A nondisclosure and confidentiality agreement covering a discrete collection of documents is practical, particularly among ethical parties. When the agreement is meant to cover anything a website participant might divulge in the future, there are huge problems. I can't say it won't work, and it may depend upon the nature of the site and number of participants, but I'm dubious, especially if the agreement is a so-called "contract of adhesion" (obligatory, non-negotiated terms) rather than something negotiated by and between the signatories.