HIG 101 for you: nope, it couldn't. People simply won't remember..
Never asked for them to remember those. Those make cloning profile impossible, as all profiles will have different UID which is part of the URL making it very easy to distinguish between users solely by comparing wishlist/profile URLs.
Phaolo and RWarehall also suggested good stuff, although maybe less efficient.
Granted, its nigh impossible to mimick the rep, low rep values can be mimicked.
Registration month/year can't be mimicked.
Displaying more information in chat is good.
Forced lowercase in chat is good.
Baning similar characters can be troublesome, because adding hidden characters will overcome it - but I have no problem with this.
Eitherway, the scammers use two tactics: similar usernames to confuse, and too good deals to lessen awareness of new/unaware members.
Edit: just tested and found out the thing above to be impossible on registration. Well, its already something! Thanks GOG!
Lin545 has the habit of suggesting overcomplicated solutions. :P
I'm a certified