Pro players don't join beginner servers on alts to bash noobs regularly, it's what blackbelts do once they realize they're not in Toribash kindergarten anymore.

Best way to prevent people from joining beginner rooms on alts is to restrict alt account creation. As for giving HS any special permissions, it may be a thing but would require changes to the group (primarily, in its management). Yes it has mature members now, but there should be a higher-up in charge if we discuss giving HS halfop as TAs had.