We want WhatsApp Inc to provide us Privacy. Double Blue Tick Ofiicially means the message has been read. This may cause serious problems is Friendship and Relationships. 

So we want an option which will allow us to set, who can see this and who cannot. 

For more: http://www.sumitkar.in/2014/11/Request-WhatsApp-to-channge-blue-check-mark.html