How do you feel about contributing to professional networking sites (LinkedIn, Rallypoint, etc.) during duty hours?

Mission first, Rallypoint always.

I believe these types of sites are a valuable resource, when used properly. They can quickly turn into "Military Facebook", however, with little to no value depending on how they are utilized. If daily tasks and/or mission essential tasks are suffering because someone is chasing "Influence Points", then there is a problem.

The most important influence will always be the one you have on your own organization.

Contributing to these sites during duty hours can be professional development and are a good resource to get answers to military related questions. I do not think it should be purely reserved for your personal time but when a co-worker spends too much time on these sites and it detracts from the accomplishment of the mission or other office related tasks then it is a problem. Leaders should police up their subordinates and peers should let each other know when they have a problem.