Seamus, I agree with your concerns and criticisms to some degree here, but you are being a bit harsh. As for putting my mouth on a reptile, well, I kiss my lizards on the head daily!
I mean look at this face! How can you resist! Sweet William, crippled from MBD but smiling anyway! (How's that for anthropomorphizing?)
BTW, I don't care of they like it or not, and I don't kiss unknown lizards. We have to build a relationship first. Seriously, they get a vet check and a fecal first.
However, I do have a problem with this advice, especially the part about blowing air in a beardie mouth. Did the vet actually tell you to put your mouth over the beardies snout and blow? I doubt it because first, a vet would warn that kissing reptiles can make you sick. If they do advise to do mouth to mouth on a beardie then they would be liable if their client got sick. Second, when you blow into a lizards mouth, you are more likely to fill up its tummy rather than its lungs. Lizards have a
very small hole at the back of their throats called a glotus, and if your air is not going down it, then it is simply going into the tummy and some expansion of the torso could be air in the belly.
As for the shaking, I am worried by your word, shake here, but agree that this sounds like it might work if you are really talking about S curling the spine and its not a shake so much, but you really should caution that if you do this with too much pressure, you can seriously injure the animal. Can you post a video that shows us what you mean here? Your description is very vulnerable to misinterpretation, which I agree, can be deadly to the pet of someone who reads this and does it wrong. The word shake really bothers me. Do you mean work the spine?
Finally, if this advice is even partly right, you should stress that ANY water in the lungs warrants a trip to the vet, unless you are a reptile vet, a reptile rehabber who has training to administer medications and spot problems early enough to head them off, or someone who has worked closely with a vet. That might be you, I don't know, but suggesting a wait and see attitude is not the best advice.