Removing admins from the BuddyPress groups

We're looking for the easiest way to hide the admin user's avatars and activity from showing on the front-end of BuddyPress. I've looked everywhere and tried everything I read, but nothing works. All the options I've tried seem to be outdated.

Here is a screen shot of the admin avatars that we are trying to remove from each group. https://www.dropbox.com/s/ckcdtswu837oytd/Screenshot%202015-03-11%2010.49.42.png?dl=0

Any help would be greatly appreciated.

- Daniel