whatsapp message

Received a message from whatsapp that a colleage told me that he took for two days off,
this is not an official sick leave,
but a special permission,
for a responsible staff,
one should know the normal operation,
one could create a lot of trouble because of abnormal absence at work,
I have no words.

I just wonder that for the young generation,
even though request for leave,
not a face to face request,
non a direct phone call,
but just a whatsapp messge,
sorry,
I am not the person who check my mobile very often!