The technology used to help attackers find wireless networks is now used in many corporate wireless network platforms, to detect and block rogue access points.

The technology used to help attackers find wireless networks is now used in many corporate wireless network platforms, to detect and block rogue access points. There's an entire litany of examples where initially subversive technology became useful for defending against the same. The first vulnerability scanners were written to help attackers target vulnerable systems. They were quickly repurposed to help people find and protect vulnerable systems. The whole "evil hackers" thing is kind of a joke. Hackers are typically clever and often self-serving. By definition, they fabricate tools for themselves which, like anything we have, can be used for good things and bad alike. Many of those tools come into popular use. It's difficult to know what, actually, the intention was behind the tool's creation.