This post comes to us courtesy of forums member rrrebo. Finding that BBM Group notifications were a bit of a pain to tweak up as needed, he decided to post a quick how-to in the forums explaining how to control the message list integration.
BBM Groups is a great feature, but anyone with a highly-active group or two knows that it can quickly blow up your Messages folder with new updates and have your hip buzzing like a swarm of drunken angry bees. Thankfully, like most other BB functions, RIM allows you to control this integration. Keep reading to find out how.
If you choose Some Activities, select which items to show in Messages
For those who want to kill ALL notifications from Groups completely, select "Yes" for Turn Off All Notifications For This Group, as shown in the 3rd pic above. This should also prevent the Group icon from appearing in your Notification Bar for that group.
Save and enjoy a cleaner, quieter Messages list!