imo, facebook's demise will come soon when people start to realize how terrible it is to have all your information including your pictures and private shit you don't want people seeing on the internet. more and more there are cyber bullying and people killing themselvs from leaking pics/videos people dont want out there...also ppl are guna start realizing that job recruiters look at facebook also so it can further damage your rep.
facebook also fucks up ur girl situation if your gettn with a few girls at once, any one of them can jus check ur facebook and ther might be a picture or some other girl commenting n ur fucked. some of my friends alredy deactivated for that reason
facebook isnt' going anywhere cause the average person doesnt think about shit like that, but once people start to realize all the above points i made you'll see facebook participation drop. It will be gradual tho, prob over the next 3-5 years....just my .02
facebook does indeed fuck up relationships.... many marriages and relationships have been broken because of this.. "ex-partners' can easily be reached interfering with new relationships by bringing up past relationships... me and my girl both have been going back in forth about having "exs" still in contact.... i stumbled across her's while it was still open and found messages going back and forth with a guy she had a past relationship with..... fucking person.