The ability of a soda wash to kill AIDS and prevent pregnancy is an urban legend--though I imagine some young or particularly naive girls have tried it, it doesn't work. Vinegar will also loosen clogs in drains and makes a great toilet cleaner, but I don't see people bad-mouthing it. And finally, pure Coke syrup can be found at many drug stores--I can personally attest it greatly reduces nausea, when it is poured over crushed ice and consumed slowly--so I doubt it's being delivered in HazMat trucks.

But, I suppose if you just go ahead believing soda is evil, then you'll consume less, and soaking in that much less sugar has to be a good thing.