Your employees may not like me for this...

Employees Personal Activities At Work Can Lead To Data Breaches and Malware

This story has been evident to me for a long time, and it is a real problem in an office where there is a culture of trust and freedom around computer use, especially when a new employee brings bad online habits into the workplace.  I have seen such a situation bring a whole company to a standstill when the consequence is a severe malware attack, a sexual harassment situation, or simple discipline problems.