Read the article before posting.
However, from the article:
Microbiologists at Gojo Industries Inc. say that washing your hands with contaminated soap from bulk soap dispensers can leave your hands filthier than before you washed them. ...Their solution: Refill soap dispensers with factory-sealed soap cartridges like the ones Gojo and other manufacturers produce. (Gojo Industries)
This is no less questionable than a an ice-cream company researcher telling me that my ideal weight is 300 lb.
The only way that fecal matter gets into even an refillable dispenser is if someone is purposefully putting it there, in which case a syringe and glue would make it possible in the bas as well.