Statistically, five to six out of ten of my neighbors think my marriage shouldn't be allowed, so yeah, I'd say there's a pretty big barrier with the neighbors of happenstance. The ones who will deign to talk to us politely discourage us from attending the BBQs, "Oh you know, it'll be mainly families so it won't be of much interest to you."
I can only speak for myself but if you want to help change, come and get involved in people's lives. I partly live where I do so I can have a positive influence.