...perhaps there's no need, what with all the unsecured access points that have been documented at large corporations and government offices!
Seriously, though...if we thought scanner nuts would attract the po-leece, some yahoo chasing a PRPS car around with a modified Pringles can trying to collect enough packets to crack WEP/WPA should set off immediate alarm bells.
Not to mention that there's no grey area there, either...definetly illegal!