I was playing on the Prison server and I just used my kit in the smelting room to sort through my ket to get the armor,xp, and tools when a person teleported in using the log in/off trick and stole my stuff while my inventory was full of armor and soup but I did have a row of tools already on me. I took a screenshot of the thief it will be bewlow

 

you dont really have any proof that they stole any items soo they could of just walked in with you