I too have a bunch of those terrorist birds and would love to hear anyones advice of getting rid of them ...... as in KILLING them!!!
Two days ago I had a terrorist bird (house sparrow) peck a hole in the sole tree swallow egg in the nest box close to my house and throw it on the ground. He then began attacking the female swallow in her box. He's not bothering them any more and there are now two eggs in the box.