Can you please provide a reference to your numbers here. What I found is that the CEO had just under $2,000,000 shares and that he sold about 250,000 shares. My math indicates this is about 12%, a little lower than your 90% claim. Also, the CEO has a bonus structure that can net him another 350,000 shares in 2013. http://www.secform4.com/insider-trading/1224154.htm
Now, would you not sell off some 12% of your shares so you can purchase some nice stuff with the money? Is there anything wrong with that? I think not...I would do the same.
Your implications that the rats are jumping off the sinking ship are just nonsense. Where do you dream such things up?
Guess you wish to ignore the 845,000 total shares he has sold off so far in 2013 ... currently retaining 231,672 shares ... a few months back, the percentage of shares sold sold vs. percentage of shares retained was over the 90 percentile ...
The "rats are jumping off the sinking ship" is you poor analogy ... I merely pointed out if the CEO doesn't believe he can profit in a more substantial fashion holding onto more of his shares (I'm not saying he should let it all ride, after all he's gotta eat) ... why should the average investor not follow his lead?