I think it might be appropriate to use Badges to designate people who have a deciding role like Architecture Committee members (if we're still keeping that), stewards, or WMF legal. People who don't comment a great deal, but when they do their word is often final or at least strongly deciding. (I was going to suggest roots, but that'd make discussions in SRE very cluttered.)
See also T64324: Visually indicate when a Phabricator user is new (Welcome culture) where using Badges automatically for newbies to welcome them was suggested.

