Yeh they have a real ugly side to their game, it's clever in a way. All the top teams do really, like even thinking back to the invincibles of Arsenal. Only difference is with them you knew they were nasty bastards, with City it isn't so obvious.
But in an era where attempting a bicycle could get you sent off (if the ref deems it dangerous play), celebrating with the fans or taking off your shirt gets you booked, how does trips that stop possible counters go unpunished?