There is no option to hide from particular users.
➨It is not possible to send messages into normal inbox of the mobile phone.
➨There is a risk of anyone reading the message meant for you only. This often creates problem in the happy home.
➨There was limit of 256 persons in a group which can be changed now to 3000 with few settings.
➨Someone can get annoyed due to reception of constant messages.
➨Profile picture is visible to every person having your contact number in which you are using whatsapp.
➨Whatsapp is addictive. Once you get addicted to it, it is very difficult to get over whatsapp addiction. This is often found in school children.
➨You need to share the number with people with whom you would like to communicate.