Sewickley Hills deemed it necessary to break from Sewickley Heights about 50 years ago.
Apparently erecting welcome signs was not included in the scope of their grand vision. In fact, Sewickley Hills' borough building is not even indicated on the standard Allegheny County map. We were only able to determine that Sewickley Hills was a crime watch neighborhood, and that this crime watch was actually enforced by the Ohio Township police.
Pacifism won't get you to the top, Sewickley Hills. Neither will a lack of signage, and completely unlit, windy, forested streets. Get some infrastructure and fix yourselves up a little bit. These windy trails may have been suitable for Indian tribes 200 years ago, but they aren't cutting the mustard for modern vehicles.