Knee-jerk? We are looking at a group of runny noses and doing NO other diagnosis. Penicillin could only work in 1/3 of the cases. The placebo could look effective for all groups. If one gets away from the allergen while taking the placebo, it seems to work. If a cold has run it's course and one is taking a placebo, it could be seen to work. And many infections will clear up entirely on their own.
I'm not associated with those nutcases, and your ad hominem argument is bogus.