There are a lot of people in the world that like Facebook as a social media platform. It has an immense customer base including individuals, governments, and organizations. Many companies regularly use Facebook in their marketing and work to socially connect their companies with customers. Facebook also develops a lot of ad impressions and has taken steps to build a platform that developers can use to make money. Many pages have a "like"button or functionality to share something on Facebook. For all that it provides, Facebook fails the test of both long term and short term ability to serve shareholders (both from a growth and income standpoint).
Facebook launched its IPO in both a declining profit and declining revenue scenario. Facebook, as a product, is in its decline stage (and it reached a peak a couple of years ago). Although people will continue to use it, it will become easier for competitors to chip away at Facebook's regular user base. Coupled with Facebook's horrific ad performance and their lack of partnership with other organizations with regard to its demographic data, this spells a long term underperforming stock and an almost permanent sell (or short sell) rating.
When you look at Facebook compared to other technology giants (like Apple, Google, and Microsoft), ask "What is Facebook actually selling?" Right now, they are selling underperforming ad space and a couple of digital products with limited marketability. They have no real long term product offerings and their sources of revenue are difficult to imagine without Facebook compromising customer privacy.
Ultimately, individuals and organizations need to communicate with their financial professionals to determine the suitability of any investment for their portfolio. My opinion of Facebook is that they are a strong sell (and a never buy), but we'll see if the market proves me wrong.