These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fan-Disliked Explanation: In a rare example of the fan-disliked explanation happening early in a franchise, George Romero's Night Of The Living Dead explains where the zombies are coming from early in the first film. However, the explanation of a "Radioactive Space Probe" didn't quite catch on, and later zombie media generally refuses to concretely explain the origins of the living dead. The universally reviled Night of the Living Dead: 30th Anniversary Edition (a re-release of the movie—which is in the Public Domain—with added scenes by co-writer John A. Russo, without Romero's involvement) instead implies the zombie plague is demonic in origin.
Fanon Discontinuity: A "30th Anniversary Edition" of the original film, which cut about 15 minutes' worth of footage from the original (replacing it with newly-produced scenes) and added new sound effects and a modern music score, was made in 1999. It was not well received by fans or critics. Harry Knowles threatened to ban anyone from posting on the Ain't It Cool News comment board if they said anything positive about the 30th Anniversary Edition, which he stated was as bad (if not worse) then the memories of the authorities handling his mother's burnt corpse.
Fridge Horror: If the posse could kill Ben by mistake, how many other living survivors out there might not have met the same fate?
Ben's description of the diner incident and the scene where he beats up on Cooper kind of flirt with this.
In the remake, Cooper calling the rest of the group "yoyos." The word is goofy enough on its own, and then it's made worse by him saying it three times within a few minutes.
"Johnny, stop it! You're ignorant!
Padding: Barbara slowly tells Ben the whole story about how she got to the house, which we've already seen. Worse is that it follows Ben's far more interesting and action-packed story.
Seinfeld Is Unfunny: Night completely rewrote how horror movies are made - more graphic, more political, more nihilistic. Before this movie, even horror movies rarely had any Downer Ending. Nowadays they're expected. Today, this film would be relatively goreless, but still pretty scary.
What Do You Mean, It's Not for Kids?: This shock movie was the first of its kind - parents were used to their children going to a saturday afternoon matinee seeing "scary" movies with monsters in rubber suits, little gore, and upbeat endings. The MPAA rating system still hadn't been established. Roger Ebert noted that when he went to see it the children in the theater weren't taking it very well in the second half.
What Do You Mean, It's Not Political?: A lot of people have argued that the movie was making a statement about race via the conflict between Ben and Cooper, not to mention the ending where Ben gets shot. Actually, however, Ben being black had far more to do with Duane Jones simply being the best actor to audition for the role. According to some production members, the only changes to the script to come of his casting was making Ben a smarter person (per the insistence of Jones, who was himself well-educated). Word of God is that the ending was actually inspired by a common hunting accident where the shooter doesn't check his target due to over-excitement.
The Woobie/Iron Woobie: Barbra, in the remake. Especially in the scene when zombies eat a corpse, she is pretty disgusted, horrified, and with a realization of Squick, enough to feel sorry for her.