It's up to each driver to make sure he is at the drivers meeting to get the needed information just like in real life, in this case the preQ thread. Even though the preQ thread wasn't the "official" drivers meeting, but could be considered one since the sessions (preQ-race) are so far away from each other and it's an official session.
Can't believe people still after all these years hasn't understood that taking wrong route is not allowed in official session, unbelieveable.