>Do people REALLY put anti-freeze in their drinking water tanks?
>Does anyone REALLY think that's good for their health?
>Even if you rinse it out, does anyone REALLY believe that they get it all
>out, that it doesn't stick in the pores of the plastic?
>Please, someone enlighten me where I am wrong about this.

DON'T use automotive antifreeze for this!!  RV drinking water system antifreeze is propolene glycol, a common food additive, not the toxic ethelene glycol used in cooling systems.  (don't use the RV stuff in the cooling system either, even if it is phosphate free!)

Bill