Black snakes are good....they eat rattlers, copperheads and rodents.....
However, if you have several around the house, that usually means you have an infestation problem since the black snake follows it’s food source.....
i live in WP. there are tons of black racers. they are great snakes to have around
For some time I had an infestation of bats in the louvers of my attic windows. They crapped a lot on the patio but I was hesitant to get rid of them because they controlled the mosquito population. One day at dusk I climbed up to the attic and saw what looked like a garden hose in the louvers. Turns out it was a friendly black snake who had probably ascended through the walls of the house to dine on the bats.