Why? Do you also want to ban sugar?
No, just high fructose corn syrup (hfcs). This was somewhat of a tongue-in-cheek comment, as I have seen no definitive medical studies showing that hfcs is a health issue, but anecdotal evidence has been presented asserting that the growth in the use of hfcs (since it was introduced in the 1970s) ties closely with the growth of obesity in the US.
I think that in time there will be peer-reviewed articles demonstrating the correlation, and that at that time they will be pulled off the market amid class action lawsuits brought against the manufacturers/distributors involved. However, that time is not today.