[tommygunn]

Sometimes a public slagging is a good thing.. it really makes the guys in the room stand up and take notice even more so than had the comment been made behind closed doors.. Look what happened to the Habs this year after Guy Lafleur called the them a team full of third liners....

The key thing with that is that Guy doesn't play on the team.
I don't know of many athletes who appreciate being berated publicly by a teammate.