I'd put that badge on my listing. I know there's still need for it.
I host in a conservative area. We've had hate crimes against gays. My friend in an interracial relationship feels uncomfortable holding her BF's hand in some places. A cop in my town was fired after showing up at an Anti-Trump rally with a huge confederate flag on his truck to shout down protesters.
No wonder guests tell me they appreciate the inclusive messaging on my listing and rainbows on my house.
People can feel the difference between "I'm barely tolerating your presence" and "You're welcome and accepted here". Nobody should have to spend their vacation time and money with a host who disdainfully deigns to host them.
My concern is that by having this kind of endorsement, those who don't "opt in" are essentially "opting out" of the non-discrimination agreement that ALL hosts should uphold.
I also wonder how many other badges we'd need to create:
Hijab+ so my Muslim sisters know they're welcome?
Interracial+ so interracial couples feel safe?
Poly+ so non-traditional couples feel welcome?
Immigrant+, Vegan+, Fragrance sensitive+, Autism+....