I saw a fight - a literal fistfight - last weekend because a driver turned left through a crosswalk while a couple was walking through said crosswalk. The driver did have a green light but the pedestrians had a clear, solid "Walk" signal. Advantage: Pedestrians.
This happened late at night in an area with more bars than good sense. The walking dude, who I'll call Irish Thug because that's what he looked like, dodged the car but stood in front of it when the driver stopped. Irish Thug helpfully pointed at the crosswalk light, still in his favor, and loudly explained that he and his girlfriend had the right-of-way. I don't know what the driver said, but he apparently wanted to finish his thought enough to warrant putting the car into reverse and backing toward the pedestrian couple as they continued to the opposite corner of the curb.
Irish Thug took that as a show of hostility and the frat-guy posturing began. (Mind you, the traffic lights have turned by now and this little argument is blocking progress through the intersection in any direction.) Irish Thug started his gangsta handwaving, Driver opened his car door, Thug approached the car, Driver started to get out, Thug got a little running start and KICKED THE DRIVER'S DOOR CLOSED. Then the driver put his car into park and got out, revealing that he's probably six inches shorter and 40 pounds lighter than the Thug, who is all too delighted to take advantage of the mismatch. He starts swinging at the driver and they both tumble to the street. Pedestrian Girlfriend is shreiking at Irish Thug to STOP STOP STOP!! and passers-by are all just kind of gawking because it's still one of those weak flailing fights rather than a full-on brawl with fists to the face. A few phones are poised to dial 911 (do you call 911 for a fight like that, or do you wait until someone is bloody or knocked out?).
Dudes are rolling around on the street, girlfriend is wailing at the wanton display of ultraviolence, a parked car blocks the intersection. Finally, some guy runs up out of nowhere and separates the fighters. Irish Thug walks away as I applaud silently. Driver gets back into his car and drives away knowing that a few people watched him get beat down for being an inconsiderate jerkoff who couldn't just apologize for his mistake and move on.
So yeah, right-of-way goes to the pedestrian in the crosswalk, even if you have a green light.