I wouldn't ban it but I would ban subsidized corn. The thing is, humans want a sweetener and sugar is just as bad if not worse. Actually the history of sugar is worse then the history of any drug or evil empire. More humans have suffered because of sugar that anything else ever created by man.
I feel like landmines and rape and staphylococcus (and drug resistant variants after that) could give sugar a run for its money if we are talking about the worst things of all time xD