There are far better ways to protect / improve your clubs marks than ducking decisions or sucking up to managers. Don't respond to the home team's confirmation and that's five marks gone before a ball is kicked. Mess up your warm up timings and keep the club secretaries waiting at 2:15, kiss goodbye to another couple from each team. Tell a manager he can speak to you after 30 minutes and then leave the ground before then, any number lost. Not controlling your gobby AR in the boardroom after the game, or even worse leave him in there on his own, any number lost (seen that happen). You can't control much of what happens on the pitch, but all of these things are controllable.
Also, in my experience, around 80% of low mark justifications related to cards are for yellow and red cards that weren't given, as opposed to those that were given.