While quali-mode is still on there's a position list being displayed in the upper right. You just have to switch names over cars on and look into the list.
Let's make an example. We're doing a formation lap on BW with the times from the quali. I pass you, look in the list and see that I still need to pass Ant[uk] to get to my position, because I'm listed just above Ant. For the example's sake we'll assume that I then I accidentaly pass Ant and Bean0 during the formation lap for some reason. I'll have Dan in front of me and see that I must have passed Bean0, because my qualitime was slower than his. I fall back and get into my position.
And even if the formation-lap ends up in a bit confusion it isn't that bad. More importantly there is no wreckage and no one can accidentaly put a better qualitime down in that timeframe (for example those guys who did a really bad qualitime can improve accidentally by just having fun on the track).
Please note that this doesn't require a lot of self-discipline. You don't even have to finish the formation-lap in quali-order. We're just driving somewhere where Dan can do a quick tab-key-count of the cars to make sure that everyone's on the track (and no one went afk or something). I just chose the format of a formation lap because that's quite near to real racing.
Vain