NOT all companies see digital social media as a liability. Some, particularly technology companies, encourage their staff to Tweet, blog or use Facebook if they do it responsibly. These are some guidelines they set out:
Information technology company IBM's social computing guidelines
IBM
Whether you are posting in praise or criticism of Yahoo!, you are encouraged to develop a thoughtful argument that extends well beyond '(insert) is cool' or '(insert) sucks'.
Internet company Yahoo!'s personal blog guidelines