I found a hardcore anarchy smp that started on New Years Eve and it is made for people who want real risk.
You get 5 deaths total and then you are banned forever. Every time you die you also lose 2 hearts so it gets harder and harder to stay alive.
There are basically no rules and there is no land claiming and no teleporting. You can raid and grief and fight if you want or you can try to hide and only trust yourself.
It also works with voice chat so it can be good for making stories and friendships or just total betrayal.
The server runs on free hosting right now so it can go down sometimes. Players can restart it using the host panel link if it shows offline.
Website