Okay. Thanks. Looking through that article and some of the links in it, that makes perfect sense. Someone probably could find a way to make this hackable, namely, since most of these ad-hoc networks are computers sending out requests for a response from what it believes to the the computer offering that ad-hoc network (this may explain the hpsetup ones too), it is probably possible to have your own ad-hoc network named that, and then all of these computers could go and try to connect to yours. And then you can see if you can get in through it.

So this is possibly exploitable - but I wouldn't worry about it as an end user... too much.... yet. I'm sure someone will try to take advantage of it eventually, though.