Hold on a second.
Let's not be quick to judge falsely.
From looking at Rob Bell, his teaching style and message is quite different than most of the reformers but that doesn't mean we should 'throw out' Bell's teaching.
Instead like everyone, even the Reformers, see if they lead people to Christ.
If they, Bell included, are doing so. We need to NOT stop him or criticize his work.
Mark 9:38-40
38 John said to Him, "Teacher, we saw someone casting out demons in Your name, and we tried to prevent him [b]because he was not following us."[/b]
39 But Jesus said, [b]"Do not hinder him,[/b] for there is no one who will perform a miracle in My name, and be able soon afterward to speak evil of Me.
40 "For he who is not against us is for us.
Americans, myself included, have become tooooooo critical of everyone. The reason why we have so many denominations, I think, is because of people thinking they have a 'better exogesis' and if people don't follow your understanding of the bible they are 'less holy', or in this case, 'not holy/godly'.
If you want a 'false prophet' go to Miami, there is a guy who thinks he is Jesus. If you want a 'false teacher' go listen to Arnold Murray.
Instead of being 'God's bodyguard' let's be God's intercessor. And then in humility offer our opinion, if we can before the presence of God.