Whatsapp considers that our privacy or our decision to ignore someone is capricious passengers. At least, it proves it with each of its updates, which should be thought by a person that his friends ignore. If the blissful blue tics or the crashes had not broken enough hearts, now, our right to ignore someone is broken by the instant messaging app.
Just like on Twitter, just by putting the dot in front of the name of your ‘victim’ this will receive a notification without you can do anything to avoid it. No matter how silencies the group or that person: you can not escape. In addition, if the author of the message decides to put your name in a group chat, everyone will see, making it more difficult for you to do the ostrich technique.
Regarding this: each person will see the mention with the “@” as saved to the contact in your phone. If you do not have it, only the mobile number will appear.
Actually, there is a possible solution if you get fed up with this. In the settings-notifications area you can uncheck the option to show notifications in groups.