It's not a question of piling on. It's about accountability. This is a board for journalists, after all, and we ought to strive for a higher standard than the Wild West anarchy exercised elsewhere on the web, particularly when someone's career is at stake.
Ask yourself this: How many newspapers would allow you to run an anonymous quote attacking someone or advocating his dismissal, particularly when no new information was introduced in the quote? If it doesn't meet the standards of fairness of responsible journalism outlets -- and of the many excellent copy editors who have saved some of us from ourselves -- why should we not demand the same from a journalism board read by thousands of professionals?
It's one thing to make a snide remark about a particular piece of work. It's quite another to contribute to a firestorm that can have serious consequences for an individual. That's not to say that Mark Whicker, or any of us, is above criticism. But it's shameful and pernicious for journalists to anonymously advocate penalties that imperil someone's livelihood.
Lastly, it's more than slightly hypocritical to claim you can't identify yourself for fear of repercussions when your published statements may create repercussions for one of your peers.