Work force from India here. There are a lot of companies where whatsapp works as a communication medium. Apart from email, slack etc. It is taken for granted that team is available on personal communication channels and can be bombarded with messages anytime of the day. Right now I am on about 6 work related whatsapp groups. And this is pretty pretty common that we don't even realize that it is a problem. For all the moaning about 'westernization of culture' I seriously wish they pick this one leaf to realize how the world outside is and how it would help personal lives.