This is the correct answer. Be crass, make fun of both parties whenever possible, and be sure to mention something like, "You mean like assholes that annoy others in public with loud video chats?" Engage as much as possible. If they confront, be sure to point out how they were inconsiderate first. Another tactic is to play music that you like that you know others will not. This is really only good if third parties aren't present. I blasted some twisted dark Bass, and the rude family left before the second track of the two-hour set finished. After I turned it on, I explained exactly what I was doing to my wife. "If those assholes are going to be rude with their noise, it must be okay to listen to my music. Fuck 'em." I don't think they wanted their children to hear that either.