Board Thread:Off Topic/@comment-25396609-20160125214134/@comment-26397825-20161024124734

Grimm very specifically hunt down humanity. They don't ignore it if it ignores them. They hunt it down. The only time they don't attack when they find humanity is if they are smart enough to know that attacking now would end in their death and wouldn't hurt humanity that much. In that case, they lie in wait and attack at an opportune time, when defences are low and they are guaranteed to do a lot of damage before dying.