Wouldn't work here!
"I don't know about that - the tool didn't exist until he created it and published it, thereby providing a new means for attacks to be launched."
Yes it did exist. Deauth attacks have been around for a long time, software to run rogue access points has been around for a long time, and of course software to sniff or mangle the traffic on said AP has also been around a long time. To me, the fact that you didn't know this even existed and now know it does indicates this has done it's job, making people aware of the potential problem.
I don't think it'd work on my parents! If they got that page asking for the WPA password, my mom'd be like "Oh, hell, I put that password in like a year ago. I wrote it down on a note in the drawer somewhere, where'd that go.... oh, never mind, I'll just go do something else." 8-)