Zombie movies are what prompted me to purchase 20,000+ rounds of .22 Long Rifle.
.22 Long Rifle is enough for a headshot on a slow, lumbering target. Should be enough for hunting small game should society crumble or otherwise become disrupted, too!
George Romero's movies have gotten successively more anti-human and have become full-blown, pro-zombie propaganda.
There's still plenty to learn from in each zombie movie, be they pro-human, pro-zombie or objectively neutral.
The following are a small sampling of lessons I have learned from these movies.
Night of the Living Dead - Bring all food, weapons, radios, supplies, et al. upstairs and destroy the wooden staircase, thus preserving all party members while remaining out of grasp of zombies. Fill all containers and bathtubs upstairs with water, too.
The father of the infected child should have been killed the moment he became combative and confrontational. He was a threat to the group, as well as the infected child. They should have both been removed from the equation and, likely the mother, too, since she would probably become a liability after losing her family.
Dawn of the Dead (original) - Don't be reckless like the white cop. This led directly to his infection and death(s).
Don't unfortify your kingdom the way they did by keeping all stores unlocked once they took over the mall, leading to an easy subsequent takeover by the Pagan motorcycle gang and then the zombies, once again.
Don't build a tiny, thin sheetrock wall to obscure and defend against the only point of entry to your fortified sky-bunker. It will fail.
Day of the Dead - If your commanding officer and every one of his subordinates is homicidal, irrational and sexually frustrated: flee or kill. Those are your only two options and it is better to pick the time to do one or the other rather than have them eventually forced upon you when you are unprepared.
Don't house zombies.
Don't let zombies gather upon your perimeter without immediately killing them. They claimed there was an ammunition shortage. Fair enough. Is there an axe handle, crowbar or steel pipe shortage? The zombies were contained behind a chain-linked fence. Get a ladder, lean over the fence, bash their skulls in. Kill all that come and you won't have to worry about a thousand ghouls eventually pushing the fence over. Their cries draw more zombies, anyways.
The Walking Dead - Merle should've been shot or thrown off the roof. The world is over and this guy was actively working against the few survivors. He was a greater threat than the zombies and had to go. His brother should've been told he got eaten by zombies and there was nothing anyone could do but that Merle kept the zombies busy long enough for them to escape.
Don't camp in tents. Like has been demonstrated previous, find a multi-story building and destroy the stairs. Use ladders or ropes to descend at will to forage supplies and draw up the ladders and ropes to sleep peacefully at night.
After any zombie encounter, once the event is over with and all are secure and safe, everyone will stand in a circle with a gun in their hand. Each person will, one at a time, disrobe completely. The other members of the party will visually inspect their entire body for bites or other abrasions. If none are present they will get dressed again and then hold a gun while the next person does the same thing. This will repeat until all party members have stripped and passed inspection for possible exposure to zombie infection. Too many times we see someone get infected, hide it, and then kill members of their party later on.