Is this answer really correct? Especially the portion just after the first quote?

@M.A.R.ಠ_ಠ I like them :)

[ SmokeDetector | MS ] Blacklisted website in body (99): "some of whom" or "some of them"? ✏️ by Vino on ell.SE

[ SmokeDetector | MS ] Offensive answer detected, toxic answer detected (160): Is there an expression for when you say one thing and the opposite happens? by user96069 on ell.SE

@Man_From_India I do read “while people are watching” as referring to different people than those at the beginning of the sentence at first glance. I can understand the sentence, but it’s not the idiomatic way to phrase it

I might say “Popcorn is the only acceptable snack for movie watching” The other variations are overly verbose for the subject matter

@ColleenV I would just say "popcorn, gimme". You're being too verbose.

(`･ω･)ゞ @Snail

@snailboat well it depends on situations. Such constructions can express either different subjects or the same. Isn't it?

> While he was working in New York, she was growing up next door to his parents in California.

@snailboat Well, yeah, that's the thing. Do you think they would object to "How to do X"? Would you? I think that's equivalent to "Doing X" and thus perfectly acceptable. But when the intent is that of a question, made explicit by means of the question mark, in my opinion that doesn't look natural (it's just a little unusual, or iffy as you say), in the same way "Doing X?" wouldn't, but even more so because it's obvious you wanted "How can/do I do X?" or some such.

It is different subject. The subject of the while clause and the subject of the main clause is different.

> While you're waiting for the perfect approach, your best bet is to mix and match.

Here it is the same.

And if we rewrite the last sentence, the same thing happens.

> While waiting for the perfect approach, your best bet is to mix and match.

@snailboat is not it the same?

@Man_From_India That's exactly what she meant with "doesn't entail that they're different people, but it does imply it.".