Well, when a person joins, it can be quickly determined if they've been at forums before... if not, then they're whatevered until it's decided that they are a mature enough member? That I think is the way to do this...
I'm still against it. It sorta takes away the freedom of the newbie experience, having this vet' constantly looking over your shoulder... even if they aren't actually doing that, it will probably feel that way...
