Can you call Facebook a vice? I think it should be considered as one. By definition, a vice is a moral or habitual shortcoming or defect. In that case, Facebook CAN be a vice. Everybody now is so addicted to it that most people do not go through a single day without checking their Facebook accounts at least once.
Plus, there's this thing with the Facebook games that get people so addicted and glued they are more than willing to spend a good quality of their time trimming up their farms, decorating their fake restaurants, and killing their friends' mafia. How weird is that that decades before, our parent would often reprimand us if we spend countless hours playing Super Mario or other Nintendo games. But now, even our grandparents have their own piece of land in Farmville or Farm Town.
Before, we use to play house or play cook with our friends using plastic toys and ceramic cups. Now, our restaurants, hotels, and night clubs can just be managed by a simple click of the mouse. We can leave them unmanaged for as long as 2 or 4 days when in fact, real life business like these can never be neglected by the owner for even just an hour.
I confess that I play those supper-addictive Facebook games too. It takes up at least two hours of my daily internet time. But I also am proud to say that I know how to set boundaries and limitations. I have said goodbye to my farms because they just happen to eat up so much time, especially when you're plowing or planting seeds.
I still hope that someday, I will get to maintain only one game in Facebook and no longer have to slave over those entertaining entrapments that they have deliberately set up for their users.