Basically if a ref wants to they can do what they want, Micah Richards hand ball at Anfield in the semi final second leg, sterling dive vs Sunderland that was a pen, Aguero booked for diving against Southampton when it was a pen, Sterling pen vs Everton midweek, Navas vs Everton, Yaya vs Utd just before half time last season( think we should of had a couple that day too) when fouled by Rojo. Just a few of the top of my head, plus Nacho's goal given offside against Bournemouth.