Guys, the problem isn't in zombies block damage. Even if it is unnatural. The problem is in the bloodmoon hordes spawns infinitely, that doesn't looks realistic at all. Interesting thing is in it's doesn't matter what level of difficulty u had chosen. At moment you got 200+ level, you will be attacked by infinite hordes of radiated zombies, that will be everywhere. A more interesting thing is that u can run all the night with the shotgun and can have a base with 10-50++ turrets - you will have same result, but with turrets u will spend arround of 1200 ammo per turret (it's really doesn't matters how many turrets you have - as fast you kill zeds, faster they will spawn) will give you the same result as if you will run to the jungle with about 700 shells in your shotgun, but also, you will have EXP from dyings zeds.So +1 for base is being useless at late game. The buildings / builders are being useless.
I can hope adjusting horde cap (i mean maximum amount of zombies spawned per player level for BM night / total cap) settings can save the game, but really i am waiting for some random behaviour - I am waiting for a really nightmare horde, that will knock destroy all i have and just a bunch of trash, that will run and die on my very basic traps.
At my opinion, BM hordes spawning needs serious rebalance. It's not challenging at all right now - it's just a infinite radiated horde with alternative to run all the night on your bike, then by morning, kill them all with just 100-200 bullets instead of 1k per turret on your base.
p.s. Sorry for my broken english, i hope you got what i mean by reading all this mess