Once you update your WhatsApp, you will be able to create a group where only you, as the Admin will have the power to talk.
This will enable you to get the necessary attention needed for people to pay attention in the group.
“One way people use groups is to receive important announcements and information, including parents and teachers at schools, community centers, and non-profit organizations,” the company wrote.
Sometimes, you create a group for the purpose of selling an idea. The next thing you notice is, people keep sending messages that divert attention from the main purpose of creating the group. This feature is obviously a step in the right direction for you if you suffer such things.