Facebook has so many features to entertain you and spend your time.But I found it waste of time I justify that with the following listings. .
-Games on FB are addictive and non productive.
-your account details are attached inclusive of your bank details.It is not secure.
-It can lead to the personal problems in case of issues social wars.
-Data can be hacked from your personal desk.
-Its not about the social engagement rather it is a pure business of referral, advertisement and marketing of products.
Therefore, use it wisely and have a control of what you are doing on FB.