I'm not sure if this is a bug or if it is a setting, but I have noticed that I cannot attack an NPC significantly higher than my CB. For example, my CB is 7.8 and I've tried to attack level 25 Ammonite Crabs however a message says "you cannot attack this npc". If it is a setting can it be changed? I find it annoying having to look for monsters closer to my CB in order to begin training.
Can't attack the crabs at all whatsoever.