Reminds me of the urban legends back in the 1960/70s about people who had figured out how to get free long-distance phone calls from Ma Bell's payphone booths. Supposedly they were able, by blowing whistles into the phone, to reproduce the sequences of exact tones used by phone company switchers to route calls across the network.
One of the legendary personalities in this subculture had the nom de guerre of "Cap'n Crunch", since he supposedly used a plastic whistle that came as a free premium in boxes of that cereal brand.
Of course, this captured people's attention, a way to get something for nothing from the AT&T telephone monopoly . . . but ultimately, whether the story was true or not, the theoretical practice aimed to game the system to derive benefit without paying. The justification was all rolled-up in a fairly common view back (before the break-up of AT&T) then that the telephone monopoly was unjustified and somehow oppressive and evil, so ripping it off wouldn't be wrong . . . and in fact, in some way, heroic. (Sounds pretty lame today, no?)
Anyway, in the current eBay case, the practice described would use eBay's system (paid-for and owned by eBay's shareholders, people like you and me) without paying. So I'd say nah, don't do this, even if eBay DOES feel like an evil oppressor at times, too!
