If it needs saying:

If a prospective employer asks you for your Facebook (or other social media site) passcode, please remember that you are not just giving up your own 4th Amendment protections, but those of all of your Facebook (or other social media site) friends, which presumably include some people you actually like. Frankly, I don't understand why any organization would want to hire someone willing to violate the privacy of their nearest and dearest (what's a trade secret worth after that? Oh yeah...actual money) for their personal convenience, but if it needs saying...I do not consent for anyone with view to this Facebook (or other social media site) account to violate my Fourth Amendment privileges without the appropriate court order authorizing it.