It's not all dirty.
Two of Biss's yellows were dissent. Against Woolwich Ben White elbowed someone and it wasn't given, we ended up with two yellows from a foul and dissent. Madders has had two yellows for dissent, Son too.
Some fouls for breaking up play. It looks worse than it is. Across the games we've had nearly 50 yellows - three per game on average. It's just there's more in some games than others and we've had four reds in total, with most of the worst calls happening in the last ten games so it's fresh in the memory.