Definitely, but it's worth for them to defend against or go after the few people willing to use this method to get free Wi-Fi on planes? IMHO they'll spend more than what they'll gain.
I fear that this would be viewed thru the lens of “PR” & “brand”, thing companies are rightfully keen in protecting. Unfortunately there’s a legal component to all this also. The knowledge itself is cool & even actual instances of a handful of people getting “free” internet probably wouldn’t register on their radar. But the publicity from being on the top of HN... that might be of significant concern
