"Not at all. The issue here isn't statistics. It's that less-than-brilliant people could potentially be making huge, life-changing decisions based on this test."
Maybe Darwinism should take its course.
"Yes, the tests might give you an idea about your risks for certain health problems, but there is no real benefit to these kits. The same testing (or better) is available through labs, if someone feels it's necessary."
These genetic test kits are processed by CLIA-certified labs using state of the art equipment (Illumina for example - http://www.illumina.com/systems/iscan.ilmn ).
"Not to mention, as someone said above, family history is a pretty accurate (and free) way to get similar information."
Not if: 1) you don't know who your family is; and 2) there's a history of mis-diagnosis. Looking at a family that is now recognizing widespread Celiac Disease and gluten-intolerance, decades of past GI-related ailments in deceased family members including ulcers, gastroesophageal reflux disease, colon and esophageal cancer suggests a common basis that was never considered in individual cases. I've seen bad drug interactions diagnosed as epilepsy, peanut allergies diagnosed as candida to chronic infections, other food allergies diagnosed as Barrett's esophagus, allergies diagnosed as personality disorders, etc., etc., etc...
The kits that Walgreens proposed having in their stores seemed to have an element of bait and switch in them (low initial cost followed by a variety of add-ons), so the tests packages should be clear as to what the consumer is really getting. On the other hand there are big pharm companies making huge amounts of money off consumers who neither understand their meds, nor side-effects/contradictions, nor general effectiveness, nor how lifestyle changes can often be far more effective than the meds they're prescribed.