Intent matters. Roads aren't built with the intent of facilitating crime. A firearm is a better comparsion, because it's built with the intent to kill. Indeed this is the defense route that many are choosing here for this app. However there's an additional problem, in that this app was originally launched on HackForums, where the author also frequents. HackForums is a cesspool of criminals, so while there are some legitimate use cases that can be conjured up for this app, none of those legitimate users would visit HackForums.

The gun analogy is good but shouldn't there be more than just intent? Otherwise, a gun-owner merely frequenting a section of town known for crime activity would suffice as "intent".