In a WhatsApp Group, not even admins can control the content of messages sent on the group. As a public 2-way communication channel, members have the freedom to express themselves. You can’t choose what members send, nor can you delete their messages.
This can make it difficult to regulate malicious members unless you outrightly remove them from the group.
Also, members may choose to turn off notifications for the chat group. This means that any incoming messages to the group will be muted. If you are sending an urgent update or a time-sensitive message, this may affect the timeliness of your communication efforts. 😐