Ordinary Gweilo

According to this report, it seems we may need to start worrying about crows coming into our homes looking for food. According to the report:

Crows are dangerous because they are not only highly intelligent, but aggressive as well.

Are they saying that stupid birds would not be so dangerous? Surely a highly-intelligent bird would be able to figure out that staying away from humans would be the safer option. Or do they fly in and change the channel to Discovery or National Geographic so that they can watch nature programs and figure out where they have gone wrong?