I say again, there really should be driver's pre-race etiquette/brief at each track. Such as: "Be aware of going two-wide at the chicane. If side by side, the car on the inside entry, has right of way. If the car on the left, is a half car length ahead, before the entry, the car on the right should give way."
Everywhere else is fair game.
Tracks need these type of guides even in the Free Practice. We get an official video in Circuit Experience, detailing how to navigate the chicane. PD could use the same YouTube video, but with warning text, instead of the voice over. PLace the video below the "Race Rules" column.