What would be an effective zombie killing structure that an average person could put together in a typical suburban neighborhood? Previous discussion that touched on the topic often rely upon machinery like wood chippers that would break down after some number of zombies, serendipitous natural structures like rivers to wash away zombie body parts, or mil-spec Fort Knox/Cheyenne mountain type forts that an average person wouldn't have the resources to build.
Key features of the structure include:
- Easy to construct by an average person
- Able to handle being rushed by a horde of zombies
- Method to easily dispose of many zombie bodies (without relying on a convenient river or ocean nearby)
- Durable and low maintenance, ideally self-cleaning
A common answer is the pit or moat, optionally with spikes and alligators. While it's not a bad solution, the downsides of such a structure is it fills up over time and would need to be cleaned out manually, as well as requires a heck of a lot of digging. I'm sure there's a more clever solution out there.
Bonus points if the zombies can be put to work towards their own demise.