-Black out or blur your faces, as some angry netizens may try to target you. I wouldn't worry about blurring the faces of those blacked out -- they didn't seem to have an issue with it before they lost consciousness.
-"Pose" with blackouts at your own risk. Koreans [apparently] find it very offensive, moreso than people blacked out all over their pavement.
-Please no homeless people. Use your best judgment.