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not really. contrary to popular belief, lab accident hardly ever get out of the lab. sure a few may die but not all of them, especially since the only way to get it is directly from a zombie then they'll take not chances of getting infected.

This is hopefully something you would have studied up on prior to invasion, it's more effective than you give it credit for.
You aren't going to fend off a horde of the ******** with it, but it's great for a quick dispatch in a hand-to-hand situation.

And the brain map is ridiculously easy to remember.
The only hard thing to hit would be the thalamus, but in that case just aim for that bundle of nerves at the base of the skull.

The skull is fragile, plus if you're using a hammer (long handled) you have a lot of force being put into one small spot while using minimal effort and swing room. May as well learn where to swing it to immobilize a zombie in one hit rather than three or four.

Pretty much this operates under the "destroy the brain destroy the zombie" concept.

While were talking of immobilization why not use a spike gun?

It's basically a potato gun but with a few dozen thin 6 foot spikes.

You aim up in the air and fire. the zombies get impaled by these spike, usre it wont kill all of them, bu i'd like to see the bastards move. After that you can just pick them off at your leisure. and you could have about 10 of these guns against a whole army of the things and it could probably immobilize at least 1000 of them if your aim is right

well that depends on if your in a town or not.

if youre in a town, get on top of a house, or inside one

if youre in the woods then there are sleeping bags that i saw recently that can be used in a tree.

actually depending on where you live the terrain can be your best friend.

I used to live in a town that no one lived in, they all lived in the country. Well next to our house was This massive Cliff face that was angled so that it was climbable but it took some work. That would be a great stop to rest if zombies were nearby. The can barely climb stairs, climbing a 32 degree cliff face isnt gonna work for them

the Idea was to make it a stationary weapon used at one's permanent base to take out zombies at medium range. You could have snipers posted to pick off zombies from far away up until they get to the barricades, if they get to the barricades.
and if a group has a tech/mech genius you may even be able to get motion sensor turrets that aim for the head

It's more of an anime fantasy than a survivalist reality.
As I've been suggesting in other elements of this discussion, look at real-world analogs if you want to make a guess at how a zombie survivalist group will look.
You need a group of people operating without external support (or at least minimal support). You also need a group that believes they must protect themselves using violent methods. There are two groups I can think of:
* Terrorist training camps: they are spectacularly low-tech, and run more like traditional military bases. They don't have any "tech/mech genius".
* Militia or apocalypse groups: A good (but old example) of this is the Waco, TX Branch Davidians. There are others, as well, though. You also don't see any "tech/mech genius".
It wouldn't matter much, though. Even if you had someone with the skills to design these sorts of things, he's likely a theorist with limited fabrication skills. Even if he's BOTH a theorist AND a fabricator (which is very, very, VERY rare), finding the materials and tools he would need to build things is unlikely.
Then you have other logistics problems...how much power do you have? Where are you getting it from? You can't exactly run full power day and night unless you have an oil field AND a refinery AND people who know how to manage both. Solar power? Maybe, but solar doesn't produce as much power as other methods, so you better have a TON of panels.
Speaking of skills, snipers aren't easy to come by. It's a specialized skill, and not one that everyone can learn.
The permanent base being mentioned isn't likely. It presumes the availability of a lot of resources, a lot of skills, and a lot of manpower. The chances of having all of those available in a post-apocalyptic scenario are slim.