Of course if they’re proper dark arts they aren’t picked up by the ref and wouldn’t show on this. I noticed Soton who are pretty much the dirtiest team in the league were also good at moaning, sly shirt pulls the ref can’t see, etc.
Looking at the graph not really, but we are such an outlier, and there were a few times on Wednesday where I thought “just take the yellow” when they were breaking. So maybe there’s room between naive and master of the dark arts we could move into.