Consider the alternative to Compstat:  Compstat is about measuring.  It's true that whenever we measure something (measure crimes, sit in a room and take an algebra test, measure which horse is in the lead crossing the finish line), SOMEBODY is going to try to cheat.  But the alternative to Compstat is not measuring anything at all.  How is that better than Compstat?  That's also what makes a lot of the criticism so stupid.  There are officers who will do things like refuse to take crime reports because it makes their numbers look bad - but that doesn't invalidate the concept. 

 Basically, the root of the criticism of Compstat is this:  when it comes to the NYPD, opinions are like rear ends - everyone has at least one! Raryel