[Two options; to shut up now or to tell you something... ...Welp, considering that they are dangerous, and not just people who want to break children's dreams... And this might prove to be useful for her in the future.]

Stealing Pokémon from people, destroying buildings - and they don't care whether or not there are people inside, maybe even better if there are... Speaking of which, I don't think most of them would find it hard to hurt people for their own reasons somewhere around this world at any time either... Hijacking trains, and the list goes on. Don't get in their way, I mean it.