Fake account on social network

Why there is lots of fake account on social network like facebook , orkut , google plus ,indiyarocks ,shtyle.fm, netlog etc

If i am not wrong more then 70 percent of people who are using social network are using at least one fake account with different name is not a problem but why with different sex . If boys has fake account then he create fake account with sexy name and keep sexy profile pics.

Friends to i am going to tell you how can identify fake profile

• If any one has fake account with different name and pics then it is easy for you to identify from his/her profile picture because if any one kept sexy profile picture then it is impossible for him/her to find another picture of same sexy lady :)

• Another way is from friend list from number of friends he/she has in his/her friend list

• Another way to find when did they join and how much friends have joined them in short find at what rate friends are joining them

• Tag he/she has been tagged in in cartoon or other pics then his/her own pics 

• Is any fake friends are in your list then you will get number of game request or other application request 

•  Fake account does not contain brief information regarding it contains short description

•  Girls does not send friend request to strangers so if you get nay request from girl and you don't know her then with out verifying her don't accept her request.

• But boys can send friend request to any girls so its better don't accept until you don't know him :)

• Fake account holder never update status on regular basis :)