Writer at cracked.com tries several methods of woo. All of them fail.

[Warpy]

6. Tongue color is also important in our medical system

and can tell you a lot about various disease processes, so that part isn't quackery. The needles are sterile and one use only, so there is no risk for Hep B, Hep C, HIV, or other blood borne pathogens. The risk from MRSA is minimal since the needles don't penetrate that far and licensed people clean the area with alcohol wipes first.

The part that seems to be quackery is the complicated meridian system. Even the Chinese have vastly simplified it in recent years, trying to discover the most effective points. fMRI and PET scans have confirmed its effects on the pain centers in the brain but those results have been duplicated by non acupuncturists doing random dry needling.