Been accosted the other day by a couple questioners who made me think about morality and writing. That is, I don't think most writing issues are moral issues. It's not a moral failing, goodness knows, to use adverbs, or not to use adverbs. You don't need my permission or a saint's benediction to use omniscient POV, and headhopping is not a "sin".
None of this is a moral issue. How you choose to write your story is personal and practical, but not moral, as long as (here I get moralistic :) you do your best and never forget the reader.
That said, just about anything can be done well or done badly. I am continually perplexed by the notion so many writers have that someone else doing something well gives them permission to do it badly. You know: Tolstoy headhops! Why can't I? (Well, maybe, just maybe, Tolstoy does it better? Just a thought.)
All that counts is results. If you do headhopping in a way that adds to the quality of the story, zoom! There goes my bias against headhopping! But if, as most writers find, headhopping detracts from the quality of the story, then all you've done is give me more reason to mutter darkly about how dangerous such weapons are in unskilled hands. (You seriously don't want me muttering darkly. Maria Callas, I ain't.)
We are both of us analytical, and we've seen about everything in submissions and contest entries. We've seen all sorts of writing choices done well, and done badly, We try to warn off writers from the choices that tend to be done poorly, and/or suggest ways that some writers have done this exact thing well, or that we think might work around the icebergs and sandbars. But always, always, the trick here is to do something well, and you know what? The reader is the one that gets to judge that. Not you. Not me. Not Tolstoy.
But just remember this: That Tolstoy could do (whatever) well doesn't grant you absolution to do it badly. Serve the story, not some weird writing commandment or mutiny. This truly isn't about you. I am not your reader, not your editor, not, heaven forfend, your boss. Do what you want. But never forget the whole purpose of this enterprise is to give the reader a good experience. Ignoring that commandment is the only sin we've got in this free-wheeling art of ours.