All of these passages portray the eating of human flesh as the outworkings of the curse of God in either war or famine. I deduce from that, that it is not a good thing to do...I must ask...What brought this question up?
Leviticus 26:27-30 27 "But if in spite of this you will not listen to me, but walk contrary to me, 28 then I will walk contrary to you in fury, and I myself will discipline you sevenfold for your sins. 29 You shall eat the flesh of your sons, and you shall eat the flesh of your daughters. 30 And I will destroy your high places and cut down your incense altars and cast your dead bodies upon the dead bodies of your idols, and my soul will abhor you.
Deuteronomy 28:49-58 49 The LORD will bring a nation against you from far away, from the end of the earth, swooping down like the eagle, a nation whose language you do not understand, 50 a hard-faced nation who shall not respect the old or show mercy to the young. 51 It shall eat the offspring of your cattle and the fruit of your ground, until you are destroyed; it also shall not leave you grain, wine, or oil, the increase of your herds or the young of your flock, until they have caused you to perish. 52 "They shall besiege you in all your towns, until your high and fortified walls, in which you trusted, come down throughout all your land. And they shall besiege you in all your towns throughout all your land, which the LORD your God has given you. 53 And you shall eat the fruit of your womb, the flesh of your sons and daughters, whom the LORD your God has given you, in the siege and in the distress with which your enemies shall distress you. 54 The man who is the most tender and refined among you will begrudge food to his brother, to the wife he embraces, and to the last of the children whom he has left, 55 so that he will not give to any of them any of the flesh of his children whom he is eating, because he has nothing else left, in the siege and in the distress with which your enemy shall distress you in all your towns. 56 The most tender and refined woman among you, who would not venture to set the sole of her foot on the ground because she is so delicate and tender, will begrudge to the husband she embraces, to her son and to her daughter, 57 her afterbirth that comes out from between her feet and her children whom she bears, because lacking everything she will eat them secretly, in the siege and in the distress with which your enemy shall distress you in your towns. 58 "If you are not careful to do all the words of this law that are written in this book, that you may fear this glorious and awesome name, the LORD your God,
Isaiah 49:25-26 25 For thus says the LORD: "Even the captives of the mighty shall be taken, and the prey of the tyrant be rescued, for I will contend with those who contend with you, and I will save your children. 26 I will make your oppressors eat their own flesh, and they shall be drunk with their own blood as with wine. Then all flesh shall know that I am the LORD your Savior, and your Redeemer, the Mighty One of Jacob."
Jeremiah 19:8-9 And I will make this city a horror, a thing to be hissed at. Everyone who passes by it will be horrified and will hiss because of all its wounds. 9 And I will make them eat the flesh of their sons and their daughters, and everyone shall eat the flesh of his neighbor in the siege and in the distress, with which their enemies and those who seek their life afflict them.'
Micah 3:1-4 ESV Micah 3:1 And I said: Hear, you heads of Jacob and rulers of the house of Israel! Is it not for you to know justice?-- 2 you who hate the good and love the evil, who tear the skin from off my people and their flesh from off their bones, 3 who eat the flesh of my people, and flay their skin from off them, and break their bones in pieces and chop them up like meat in a pot, like flesh in a cauldron. 4 Then they will cry to the LORD, but he will not answer them; he will hide his face from them at that time, because they have made their deeds evil.