Take a look at a satellite photo of John Wayne Airport and the markings for 20L. It's got numbers on it, but no fixed distance bars or any other decent paint to help a pilot recognize it. Not saying he wasn't at fault, but it happens. Had a friend get an intersection departure in ABQ once. Got on the runway and turned the wrong direction. Took off over top of a Southwest 737 that was taxing across the runway. Tower gave him a number to call when he landed. The Southwest pilot didn't care to pursue the matter, so my friend got a friendly chat with the tower while apologizing profusely for his mistake. It happens. I've lined up on the wrong runway. I've taxied towards the wrong runway. I've had the tower clear me to land, then cleared another aircraft for departure while I was on short final. People make mistakes. You own those that are yours, and if the other guy didn't get anyone hurt or any metal bent, you let him own his mistake and move on with life. This stuff happens all the time. It's a big deal because it's Harrison Ford. If it had been one of us, we would file the NASA report, get a discussion with the FAA and possibly a flight check, but it wouldn't be all over the news.
FWIW, Harrison Ford has stopped in at our airport a few times. Dropped by once while we were having a birthday BBQ for one of the local pilots. He's a heck of a nice guy and enjoys spending time with other pilots as they usually talk to him as a fellow pilot that gets to fly some neat stuff and don't go star struck crazy and start clicking the cameras in his face. He left when several of the women there figured out who he was and started following him around with cameras.
-Cub Builder