How can we be sure SE bans the right person for exploits if there's no transparency?

[KisaiTenshi]

So really a Hall of Shame would work and there really is no Down Side .

No, it doesn't. Some sites just list off the characters banned once they are permanently banned, and you'll see it's almost entirely button mash/default names that were RMT spam or other botting activity.

As for Real names and such. No don't be stupid. Real Name policies just result in people not using their real name -AND- being much more evil about what level of cheating they will do under the pseudonym. Best we can hope for is that that SE "shreds" the accounts with the characters on them, including all gil, items, characters, gear.