The thing about FB is that it is an excellent tool (if used wisely ) as well as quite dangerous if you do not use it wisely .
Many people are so lonely and isolated these days that they feel having maximum no of friends on their FB account is a proof of how popular they are and they are ready to accept a friendship invitation from any X,Y,Z .
The thing is I found many women are very much in to FB and compete with each other to update every hour of what they are doing i.e just got up now , had coffee , had lunch , went for a walk , went for a movie,going on a tour etc etc.Nothing wrong in this provided it is shared between few close friends but they forget the fact my friend say X had on his FB Account list of other people who have a sort of access to what I write on my wall and that person say Y can always seek an invite with you claiming he is close to X and either this person must verify with X whether Y is worthy of being added in to their network . But most of the time it is not being done and people in the urge to be more popular among others just add any X,Y,Z as their friends and later end up in problem .
My take on FB and other technology tool is that it is double edge sword and we must use it carefully . It has lots of benefits but also its dangers and one must exercise lot of caution while using the same . Lot of articles are there on the net on how to use these tools safely but very few pay attention to it .