I think that connects with events like Princess Diana touching a patient with AIDS, Mr. Rogers inviting a black man to share the pool with him, etc. It's a top down change the role models (in this case moderators) can implement to improve equality and show humans as humans which in my experience goes a long way toward shutting down any *phobic type mentalities. It's never an easy or quick change but it's important.
You can't force or even ask someone to be a role model because than that's not being a role model. Much like telling someone to volunteer makes them "not a volunteer".