This sort of omission would not be considered scientific malpractice even in a journal article, let alone a blog post. A rebuttal of a position that fails to address the strongest arguments for it is a bad rebuttal, but it’s not scientific malpractice to write a bad paper — let alone a bad blog post.

I don’t think I agree with you that GM isn’t addressing the points in the paper you link. But in any case, you’re not doing your argument any favors by throwing in wild accusations of malpractice.