Survey: IT Professionals Fear Social Media Use at Work May Pose Threat - Page 2
And I agree.
Since employees in general are required to communicate information, whether internally, with colleagues, or to communicate externally for the purposes of promoting business activities and brand awareness, acceptable practices should involve relevance, and keeping a positive image with their business and client interests. Best practices would dictate knowledge of their employees' work habits, ethics, and awareness of security issues.
As an employee and user of social media networks, if you wouldn't say it to your parents or your kids, you probably shouldn't say it online. If you would recommend against downloading information, or clicking a link on your home computer, work isn't the place to test your theory.
As for personal accounts, careful consideration of online habits and what your online demeanor may conjure in the minds of your employer's followship would be prudent and wise.