Focusing their attention on anyone
It was a side effect from the game design as enemies were incredibly tenacious and would literally chase you until you were either dead or reached another zone. They were also incredibly fickle and aggressive and had no qualms about focusing their attention on anyone else that got in their path. Granado Espada vis became infamous for this and it was an activity that was bound to not only irritate players but also attract the attention of the GMs.