Seriously, from an european POV american running seems to be messed up. Hell...its RUNNING so leave the punctilious referees who watch every single step, the eagle eye camera and all the shit aside. Is this fun for you?
Runner A touched runner B? Oh, better cry on your coaches shoulder to start a protest...NOT. Get some revenge the next curve, little elbow, little punch in the back and everything is all right.
Don't try to play football on the track. Watch some Coe/Ovett racing.
You can hate on guys like Mekhissi if you want but he gets his stuff done ON the track and not in the media or at the referees chamber.