well if you have fake people around then definitely the will portray themselves as fake .. .. it does not matter if they are on FB or on GS. the thing matter is their mentality. You will find very fake smilies even on GS .. 
Giving a judgmental statement about a technology about which whole word is using for purpose is just like those illiterate pakistani’s who doesn’t understand the concept of DST (i hope you know the stories which go around when time used to shift an hour before .. “purana time” ya phir “naya time”).
I don’t know how you use the facebook or who in your circle use it for better reasons .. but would you like to explain me how can i:
- Wana send pics to all of my family member, which are in different cities. should i email them “separately” .. ?
- Wana know what my fmaily is upto or my friends .. ?
- I came across a decent video/link/article/information and want to share with my friends (depends on what thing i am gona share to who) - would i email them individually?
- I am bored, i wana play games .. should i start stumbling on different websties to see if some site have a game that i like?
P.S:
for those, who think that your pots, status, pictures are visible to others then you better spend some time on browsing facebook privacy settings. you can even control who can see your status message and who can not. What more privacy you want?