Part of the problem here is that if you type it all out it sounds horrible. In reality, the world is not as dangerous as an Internet debate can make it sound. Type out the full description of what's involved in walking down the stairs and you'll make an emotionally-appealing for banning them ("my god, any one muscle fails to work and you can fall to your death!"), but it has no correspondence to reality. In my judgment, I am not even remotely endangering my kids in the real world. You are welcome to your opinions, but in my opinion turning my judgment over to others is itself not a good judgment.

Stairs are fairly dangerous for some people. Our neighbors child has fallen down their stairs three times, and only on the last one did he even need a trip to the hospital. He'll be fine. And probably between the age of three to 85 he's not in any serious danger of falling again. But that's an aside.

The real point is that many of the recommendations may not apply to you. That's fine, don't follow them (especially when it comes to your child... that's one place where you have extreme flexibility). But they are meant to apply to a large population, and I don't think IQ is the best metric to apply to determine if you're in that population.

Regarding cough syrups, I suspect you are familiar with the various studies, but I'll pass this along for those that aren't: http://www.cfp.ca/cgi/content/full/55/11/1081

From the article:

"The US National Electronic Injury Surveillance System-Cooperative Adverse Drug Event Surveillance program reported that OTC CCM preparations were responsible for 7091 visits to emergency departments (EDs) during 2004 and 2005 in children younger than 12 years old. This represented almost 6% of total ED visits related to medication. Of these cases, 66% were due to unsupervised ingestion. A quarter of cases were due to properly administered medications with undesired outcomes. Eight times more children presented with effects of medication errors related to OTC CCMs compared with other medications. While children aged 2 to 5 years represented the largest group in this study, children younger than age 2 had the highest rate of adverse reactions.8 Providing further evidence of the ED burden related to OTC CCMs, the Centers for Disease Control reported that 1519 patients younger than the age of 2 were treated in American EDs in 2005 for problems related to OTC CCMs.

The true prevalence of OTC CCMs in pediatric illness might be underreported. Physicians might not consider the role of such medications in various presentations, such as apparent life-threatening events (ALTEs). Pitetti et al reported 13 out of 274 (5%) patients presenting with ALTEs had evidence of OTC CCM use on toxicology testing.10 This raised concern about the potential role of OTC CCMs in ALTEs and led the authors to conclude that toxicology screening should be performed in all cases of ALTEs. "

In fact I'm rather strongly of the opinion that there are numerous real-world examples in the field of medicine and nutrition in which science has "studied" itself into wildly wrong beliefs that nobody would have taken seriously but for the failures in the scientific process and the misapplication of its authority, and as much as I love science and wish I didn't have to do this, I've really deprioritized science in this area.

Science doesn't have the truth. It has the best theory for the data at the time. But I do think in general that I trust "scientists" more than the mom trying to convince me that SIDS doesn't exist from first principles.