I hate sparrows, if they can enter a bird house they will do so and kill the existing nesting birds such as chickadees and take it over.....
If you make bird houses, you can avoid that happening by making the entrance hole smaller.......
I know a lot of birds can have negative traits and are considered pests. My grandmother lived in a big farm house and I remember my uncle shooting sparrows of the roof with a BB gun. When my father retired, he decided to put out purple martin houses. After a few years, the martins stopped coming back and the houses were quickly taken over by sparrows. Sparrows are kind of the main bird around here and I just accept them as a fact of life. Their nests on my back porch are inaccessible (one is in a space between a beam and the roof), and outside of the mess they make when they are building nests, they are not too much of a problem. I have seen them cause problems for other birds, though. Once a dark-eyed junco was minding its business in the yard and a gang of sparrows jumped it. The sparrows had it on its back and it was probably lucky to get away alive.