The author of the article, despite some of the comments to the article, is being very conservative. I would add at least 10 companies to the list.
If I was the shorting type, I would put CHK, Halcon, Gulfport, Continental and Rex at the top of my list. They didn't make the list but they will.
In the words of Nixon: trust me.
The shorts have already been in these names for a while now. Once it reaches the retail investor the trade is at the end of its peak.