Yes they can of course and most scams work thanks to inattention. But still, it's clearly a scam attempt and it's not allowed here.
If you look at the details of the auction, you can. But if you just see it at what you assume to be a good price for the collector, you might bid before realising. I think the auction feature could do with being listed like the market, with a link to the character's page and the level clearly marked.
It's not clever-- it's stupid. Do they really think the mods won't noticed a stupid little trick like that? They're going to get banned the moment a mod spots that "clever" little move. It's incredibly stupid to think that it would work. It's basically a way of telling the mods "Hey! I want to get banned!"
@Steelie: It's not just stupid people who fall for it. Some of the people who are putting up the sham listings are very well known, large card traders who really do have Kiki Cr, Rass Cr, etc. I can completely understand why someone would think that the auctions were legit and want to move to get their bid in.
@PichuLove : in your sentence there is one word which always lead to a ban : "scam".
It is theft, so no, the sanction is not too harsh.