writes "In response to people like employers who demand Facebook credentials for current and prospective workers, a simple solution would be for Facebook to allow all account holders to create "sandbox accounts". Once you create a sandbox account, you can (from your main account) selectively set your posts, photos, likes etc to be visible or invisible to the sandbox account. You can also choose which of your friends (and your friends' activities) will be visible. For instance, you can set it so Sandy Smith's activities are hidden by default, while Jim Stone's activities are visible by default.
The idea is that when logged in to the sandbox account, there will be nothing to indicate that it's a sandbox login. You will even be able to create a nested sandbox within this sandbox, with no nesting restriction.
With this in place, an employer will never know whether his/her employee or candidate has given up the master password, or just a sandbox password — with the ability to nest the sandboxes, account holders will have plausible deniability and will regain some control over their privacy in the event of duress attacks."