User blog comment:Zathronas/Speculative author: Where are the Grimm?/@comment-23790511-20140914035557/@comment-24218038-20140914120602

We need something to change our perception of them. right now, the grimm are the butts of Nora's jokes. Monty and company will need to do something pretty radical to change them into a world threat.

The hive mind theory doesn't seem to be supported by the show. The only time we see groups of Grimm working together is when they are of the same species like the Beowulfs.