i got the same problem. Sometimes, when i do a small siege (10vs10), and its a regiemtn against some public players. So we are just holding the fort, and suddenly someone teleports behind me, and storts to punch me with his fists. So i turned around and tried to stap him, and when he got the chance, he switched to musket and shot me a headshot. So it wasnt really a public server but still, when there are some people on your server, dont go cheating unless you tell them its a training or something.
(btw don't join the 61st, just some tking trollers)