Killing anyone is allowed. If you consider yourself a good player then you should be able to defend yourself. If not, then band together to take someone out, or stay inside your house.
Breaking in to houses with locked doors is not okay, because the intention of locks is to indicate an area you do not wish someone to enter. I wish I had a better system for security of land but I do not trust people to use protection tools. There's too much potential for worse abuse. The best thing you can do is log off and alert me. I will verify the incident and take action.
Killing horses right now I think is a bad thing, because they're supposed to be property like animals and should be treated the same way. I want to get some sort of protection system for that but haven't had the time for it.
I realize you guys just had some sort of dumb shitfit, but I've received multiple conflicting reports and what appears to be some SERIOUS one-sided stories, and I don't have the ability to verify any of it for now so I'm leaving those involved banned until I can see what happened. We had another user like this before who would only do that shit when provoked, so I have serious doubts that "this asshole came on and just started killing and griefing us and we didn't do a thing!!!" is accurate.
