If someone is not paying attention, yes, they could make the mistake and buy an item for a price they didn’t intend. It is unfortunate, but it is not considered a scam where we would get involved.
To answer your question, counting on the inattentiveness of others isn’t the more moral of behaviors, no. Correcting the failings of human beings try to take advantage of their fellow humans is a bit beyond the scope of Customer Support though. The Auction House was set up with specific bid and buyout mechanics, with some checks to hopefully avoid mistakes and get folks to double-check their purchases, but we can only do so much. \
I can’t speak for our Development team, Maus. Generally speaking, they let the free market operate as a free market.
If you feel the Auction House should be changed to help avoid such confusion you’ll want to submit that suggestion to our Developers.