I'm pretty sure that there has to be a huge amount of boards here. Even if the iHub System Lords were to double in number, I doubt they would be a sufficient force to police ALL the boards.
A majority of the time (I assume) they are going after the largest noisemakers and repeat offenders. It would seem that some boards run rampant at times, but there is only so much territory they can cover.
There is only one success - To live your life in your own way