jordanjay29 I tried your code.
.Badge--group--Admin {
display: none;
}
Works very well. It seems to make them really invisible and I don't see how the keen user will be able to see something. And I like the idea of hiding specific groups and not all, very good.
The problem is that it works too well ! It hides also the badges in the permissions administration window and setting permissions without seeing badges would be a nightmare. But css is so flexible, that it should be possible to overcome this problem, I guess.
Then I tried Luceos code : It works fine, hides all badges, and leaves them in the administration window. It does not hide the yellow badge with the star inside which indicates you are following a discussion.
The problem, as noticed, is that you can easily know to which groups belongs someone, just leave your mouse on the avatar. Nevertheless it is a progress.
It should be possible to get the better of both codes.