Whether you are a social network addict, a novice dabbler, or you are thinking about trying online networking, you probably have some questions about the advantages and disadvantages of social networking. For example, can it really increase one's productivity or does it just waste valuable time? How safe is it? Before you invest too heavily in online social communities, be sure to do your due diligence so you are aware of the risk versus the reward. Here's what you need to know to help you make an informed decision.