Reuters says the loans are being used to finance McClendon's re-investment in the same assets he's using as collateral.
He's apparently using the loans secured by his stock to buy more stock. The fact that he wants to buy more stock (regardless of the source of funds) seems to indicate he has a positive view of the company's future stock price. It's shady to be sure, but not sure what it says about the economics of the company.
A CEO with the vig running on $1.1 billion has entirely different concerns than your average "Buy and Hold" investor.
The primary concern seems to be that his gigantic loan of 1.1 billion requires him to come up with quite a bit of cash each month to service the interest and there is a concern that he will make decisions for the company based on his personal cash flow needs.
They think he didn't do anything illegal. It's amazing to think that these Billionaires are just never satisfied with a few billions, they are willing to pull crazy stunts like this in the hopes of being a 10's of billionaire.