This could help reduce the performance impact of the plugin. I assume that currently even with "LockNPCSeconds" set to 0, damage to NPCs is still tracked, using unnecessary resources.

How to disable NPC ???

Merged post

I did this in the source

            //if (entity is BasePlayer) // why npcs? :p
            //{
            //    var player = entity as BasePlayer;

            //    if (player.IsValid() && player.IsNpc)
            //    {
            //        nameKey = player.displayName;
            //    }
            //}

Awesome, thank you @nivex for adding this feature!