What do you want to do in? Heal the sick? Feed the hungry? Bring peace between warring nations? Cure a plague? Invent a pollution-free engine? Set the wage-slaves free? Abolish money? Create Utopia? Enlighten the ignorant? End prejudice? 
Tell you what. Why not just do what everyone else doesThe minute we hear a raised voice, we become defensive. Who is shouting and why? What do they want? Is there trouble? We enter a state of high alert, even if we soon realise that we are simply hearing a yell of recognition both misleading and off-putting.