When you submit a drug for approval at the FDA, you need to list in exacting detail exactly how trials were run, including how they were blinded. The ingredients and form of the placebo are critical for this.
The paper referenced in this blog post examined journal articles to determine if the composition of the placebo was reported. Journal article are notoriously lacking in details and they have to be since no one want to read an article with pages upon pages of details.
If his comment was "Hey, you guys who write papers on clinical trials, it would be awesome if you'd list the placebo composition, since I'd be more likely to believe your findings" I would say "fair point".
But the blog post says "Hey! Drug companies are trying to pull a fast on all of you! Beware of what's in your medicine cabinet" which is a completely ridiculous statement. This "missing information" is available to the people that matter (the FDA).
This is truly an example of making a mountain out of a molehill.