Plot hole: In what appears to be at least an hour or so after curfew is put in effect, Challis goes to a liquor store. Even if he didn't know about the curfew, why would the liquor store still be open?

Halloween III: Season of the Witch (1982)
Ending / spoiler
Directed by: Tommy Lee Wallace
Starring: Dan O'Herlihy, Tom Atkins, Michael Currie, Stacey Nelkin
The doctor manages to escape the strange town. The girl dies and a robot takes her place but the doctor manages to destroy the girl robot. The doctor manages to have the major networks stop the broadcast of the silver shamrock commercial but the movie closes with one station still broadcasting and he is unable to stop it.
Bill Bergquist
Conal Cochran: You don't really know much about Halloween. You thought no further than the strange custom of having your children wear masks and go out begging for candy. It was the start of the year in our old Celtic lands and we'd be waiting in our houses of wattles and clay. The barriers would be down, you see, between the real and the unreal, and the dead might be looking in to sit by our fires of turf. Halloween, the festival of Soun. The last great one took place three thousand years ago when the hills ran red with the blood of animals and children.
Dan Challis: Sacrifices.
Conal Cochran: The part of our world, our craft.
Dan Challis: Witchcraft.
Conal Cochran: To us it was a way of controlling our environment. It's not so different now. It's time again. In the end we don't decide these things, you know. The planets do. They're in alignment and it's time again. The world's going to change tonight, doctor. I'm glad you'll be able to watch it! And, happy Halloween.
Question: I could be wrong, but wouldn't destroying the Silver Shemrock factory disable the commercial and/or the mask chips?





Chosen answer: They don't broadcast the commercial, the cable company does. And the mask chips all have tiny pieces of the rock inside, so they will still work regardless of whether or not the factory is destroyed. So the answer is "no" and "no."