Time-consuming
Of all of Facebook’s disadvantages, I believe this is one of the major reasons why people deactivate or delete their Facebook profile. Being one of the best ways to stay updated about what your friends are doing, people spend too much time on this vast social networking site.
Facebook offers many entertainment applications and games which engage users to a great extent. Apart from that, Facebook chat and Facebook video chat are another two time-consuming features.
If you want to use Facebook to your advantage, set yourself a time-limit. Spending too much time on Facebook might make you a Facebook addict, and you might end up wasting too much time.