In today's new office environment, it has become impossible to prevent the use of social media. You can thank smartphones for that. Of course, as with all things, there is a dark side. Social media in the workplace has given rise to a variety of legal issue, from employee privacy, discrimination, and profiling (not the cool profile where you update your status and run a play-by-play of your life so your friends can keep a finger on the pulse of your minute-by-minute life). This article by Joan Farrell discusses ten areas of concern for employers dealing with tweeps and twittarians.