I'm white and my wife is black. We've been married for almost 10 years, dated for 4 more. We've lived in Philly, metro D, Chicago and San Fran. We've gotten some looks from time to time, mostly from the brothers in certain neighborhoods, but no one's ever said anything to us, and I've never overheard comments like the ones you heard or otherwise. Of course, I don't have superpower hearing. Or maybe I'm just not one of the "good ones".