crows are known to be extremely intelligent but I doubt they can be naturally malicious
they are capable of even hurting human - we have heard about few incidences here, this world of animals is survival of the fittest - who knows may be one day we will have someone superior hunting us.
So you think that Mr. Hitchcock was onto something back in 1963? :D
https://en.wikipedia.org/wiki/The_Birds_(film)
Yes, it must be real, and even there is cultural beliefs - if a crow touches the head of a human by any chance, then you know your worst days are coming.
That´s an interesting myth. Never heard of it before. Ok, I will be careful :)