A supposedly confidential Whatsapp message from one crew to another badmouthing the company or their fellow colleagues could land oneself in trouble especially when the matters are being forwarded or circulated. The crew has been told explicitly not to use any form of social media to discuss company's matters. All grouses, unhappiness regarding work, fellow colleagues and passengers should be brought up to the office.
There were cases where crew were hauled to the office and given warning letters for circulating messages of unhappiness and hate through the social media. A good example was a crew who circulated a Whatsapp message to fellow colleagues regarding the behaviour of a passenger. This message was fowarded to hundreds of crew. Another, badmouthed his superior to fellow colleagues. He is now being investigated and if found guilty, will be dealt with accordingly.
Many think the Whatsapp messages' sources could not be traced but trust me, the company has a network of people who are capable of tracking down these people.