Earlier quoted context omitted.
We already do that. You can't legally eat the meat of other humans in most (all? not sure) countries. You're not allowed to buy the meat of certain animals in certain countries, due to cultural norms (dogs) or due to protection of certain species. It's an absolutely normal thing that laws regulate or forbid things that have negative effects on society.
Outlawing meat and depriving us life's finest pleasures (eating delicious, succulent meat) would have catastrophic effects on society. It would wreck havoc on low income people, obliterate all the great meat heavy cuisine of the many immigrants across the USA and Europe, and turn us into weak, dispirited, sanctimonious saps.
Citation needed