I'd say unless someone is repeatedly being a real jerk, a Hall of Shame is really unnecessary. Shaming has become a sport lately and and it's too easy to do it just embarrass people who don't share a certain point of view.
We have enough "real world" problems that we don't need to import this into our little corner of the internet
Just my $0.02CAD
Edited to add: Also, unless you have Rick Schwartz money, being sued for libel or defamation could get pretty expensive I imagine