Some shit just never gets punished. Proof: Mario Yamasaki is the only referee to have deducted points for cage-grabbing since UFC 73 (!!) There have only been two point deductions in UFC history for eye pokes - in Hamill vs Jardine (2010) by Herb Dean and CB Dollaway vs Boetsch (2013) by Kerry Hatley. Also, attacks to the back of the head (ignoring DQs which I have not checked) are rarely ever punished. There have ony been two such deductions ever, the last in 2010 (Bonnar vs Pokrajac). In general, the number of point deductions is very low. Only 32 in the entire UFC history. IMO, refereeing must get more consistent and more points need to be deducted in order to make fighters abide by the rules. Right now, there is no real danger that rule-breaking will be costly. EDIT: Source added. It's based on an MMADecisions article from 2013 and my own research.