I've seen blood before. Unless it's been dry for hours then it would still not be that bright or thin. You gotta remember,blood is really thick and no one in their right mind will keep blood on themselves without washing their hands.
LET'S BE REAL; DOES ANYONE REALLY WANT TO SEE A POST SHOWING A HAND COVERED IN SOMEONE ELSE'S BLOOD AND BRAGGING ABOUT HOW THEY WON A FIGHT? MAYBE I'M JUST A SNOWFLAKE FROM TRAUMA BUT DAMN I DON'T WANNA KNOW THAT SHIT