Also, you're projecting. You don't (and can't) know what a person's true goals are. Framing these actions as them communicating they are morally superior to someone (you?) is a thought in that other person's head, not the protestors. Maybe these straight people truly believe this form of protest (not getting married) will bring attention to a cause and maybe change some people's minds. Did it? Who knows. But good on them for at least trying.