How have the NLRA rules about contact with employees failed to keep up with technology?

Do you think there is a difference between using LinkedIn and using Facebook in the sense that when a person uses LinkedIn he or she understands that it is a professional network. In fact, the entire ethos of LinkedIn is one of professionalism. However, Facebook encourages silliness. Facebook encourages people to post photos that go viral. Hence, should these platforms be viewed under the same umbrella?

Quick Answer Please. A couple of sentences.