As far as I can tell, this is a form of claim bypassing. A player by the name of memethemailman joined my faction for about 5 minutes. In that time, he did more than enough damage to get himself kicked, doing stuff like taking parts of my smeltery, tool tables, looting, etc. But this isn't what I am reporting since that is included as insiding and nothing can be done.
The report is because after I kicked him, he continued to kill my creatures on my land. In my claimed territory, he killed 3 dragons (1 fire, 2 ghost), 3 sabertooth cats, 5 mammoths, 1 triceratops, and a few cows and chickens in my farm. He also killed some squirtles that were in my chest that I had planned to farm, but I believe that could also be considered insiding. If there is anything that can be done, please get back to me. If not, I will continue rebuilding my base and trying to get my creatures and loot back to replace what I've just lost.
Once again, this players name is memethemailman. Do NOT allow him into your faction.