Is it ever acceptable to celebrate someone's death?

For me, no.
It’s good that Ted Bundy is no longer with us but I won’t be doing this

Yes. I can think of many many people whose death I would consider a great improvement to the world, because of the great suffering and destruction they cause.

Eye for an eye and tooth for a tooth, is invalid reasoning. If it is at all possible, people who are dangerous to society should be imprisoned. Killing them does not undo what they did. Killing is wrong and two wrongs do not make a right. I might celebrate someone’s apprehension, but I can’t imagine ever celebrating someone’s death.

You betcha! Especially the death of a total scumbag, or someone who was suffering horribly in life.
“If they would rather die,” said Scrooge, “they had better do it, and decrease the surface population.” -from A Christmas Carol by Charles Dickens

No. I did not exult that Osama Bin Laden was killed (I would have preferred him to be held accountable to the world).

And as much as I think him a despicable human being, I did not enjoy hearing of Rush Limbaugh’s Stage 4 lung cancer diagnosis, I hope only that he has a change of heart.

Be glad they are dead, yes. Celebrate by cheering and making some sort of outward display of glee, no.

It’s acceptable for anyone to feel an emotion. I would keep it to myself, though.

It’s an emotive question, one that’s bound to split opinion.
I think to celebrate a death is wholly wrong on every level, repulsive even.

However, if anyone brought deadly harm to any of my family, especially my kids, then I’m afraid I’d want them dead.

I am guilty of celebrating Bin Laden’s death. I am not proud of that.

People did celebrate Hitler’s death in a way.

That could be the only time it was universally accepted to celebrate someone’s death.

I never have celebrated someone’s death.

Hitler’s death. Wish he died painfully a million times over.

Yes. I won’t go into detail, but there are a few people who would make the world better by them making their exit. I have no shame in saying so. These particular people have wreaked so much havoc in my life, and the lives of people who I love, with no remorse, that it would take a weight off of my shoulders to see them gone.

Apparently it was for L. Frank Baum and Harold Arlen:

Once there was a wicked witch in the lovely land of OZ
And a wickeder, wickeder, wickeder witch that never, ever was

She filled the folks in Munchkin Land with terror and with dread
Till one fine day from Kansas

A house fell on her head
And the coroner pronounced her, dead

And through the town the joyous news went running
The joyous news that the wicked old witch was finally done in

I agree that when you have a malevolent, supernaturally powerful monster flying around killing villagers, only its death will bring immutable relief, given its ability to return from anything less.

Edit:

It was more likely for E.Y. Harburg than it was Harold Arlen.

@Brian1946 Thank you for bringing me laughter in such a dark thread :D

@Mimishu1995

I was going to post something more serious in addtition to what I wrote above, but bringing you laughter means more to me, than reiterating what has been said by others before me. :-)