Agree, refereeing differently with an observer there is very risky, especially once you get to L4. Clubs know full well when referees are doing it, so for all you might get your observation mark up by 0.25 or 0.5 you might lower your clubs marks by as much as 20 or 30.You missed my point. If you don't caution big gaz when the observer is there, why do you when he is?
I haven't said anything about what I do and don't do, I referee my normal game for an observer.
Give u an example, step 6, first game this season, sub midway through first half, young lad, comes running straight on before injured player left. Do you think I cautioned him? No, he was a young lad, probably 17 or 18 year old, who was clearly very excited to get his big chance at step 6 football. Did i get done by the observer? No I did not. I didnt hide it either, I hauled him back to do it properly and warned him that he was risking a caution just running on.
I ran a risk of the observer not being happy with it, but I can be certain had I cautioned, everyone from the player, his team mates his opposition, and spectators would have all been surprised to see a card and it would have negatively impacted the game.
You do your game, if the observer takes exception to something, you sell it to him with sound reason and a good observer should understand why you have done something if it benefits the game and or your match control
Observers are (generally) less fussy and more sensible these days and shouldn't be picking up on something like a player running on too quickly at a sub. They would if you let it happen, but because you managed it a caution would clearly be overkill.
The same for @spuddy1878's example, I'd be really worried if an observer penalised a player for stepping off the pitch to grab a water bottle. That would be encouraging unsympathetic refereeing and shouldn't be happening these days.