[2023] Concerns About Zombie Spawning in open base

Originally posted by Corsin: Do you have a bed roll down and do you have player placed blocks completely covering the ground inside your perimeter walls?

By default, LCBs are about 41m square (or thereabouts) and the bedroll blocks around 35m (forget exactly). LCBs do not prevent spawns within a LCB area if bare (unbuilt on) ground is present.

Bedroll only block POI spawns and random biome spawns.
LCB only blocks POI spawns.

There is a myth that if you fill the area with player-placed blocks, it will stop spawns. It does reduce it, but it is not a 100% guaruntee of having a spawn-free area. Especially if you have a large area.

Originally posted by Ankido: Have you ever considered that some of us want to enjoy a true survival experience rather than just a tower defense game?

You have the option to disable zeds in the game settings.
Aside from that, the developer does not want you to ever feel "safe". There should always be the uncertainty that you will be attacked. That a zed could sneak in and show up outside of your control.