I'm surprised to see that no one has hit upon the REAL reason why we can't eat dead babies: It's because the Dead Baby Jokes PAC has some of the most powerful lobbyists in Washington, and they have exerted enormous pressure on elected officials to perpetuate the taboo status of baby-eating. If the consumption of dead babies were to become acceptable to mainstream society, it would cause irreparable damage to the thriving dead baby joke industry, since the "shock value" of its products is derived almost exclusively from their detailed and often graphic depictions of culturally unacceptable practices involving dead babies.
For instance, if eating dead babies were legal, the following, two-part joke would completely lose its punch:
Q1) How do you get 100 dead babies into a bucket?
A1) With a blender!
Q2) How do you get them out again?
A2) With tortilla chips!
For these reasons, sadly, it's doubtful we will ever see the day when law-abiding citizens can visit their favorite bistro or delicatessen and dine on dead baby.
And don't even get me started on the Fart Jokes lobby, which has all but obliterated my chances of ever being able to fart loudly and proudly in board meetings, on first dates or at family funerals!