We've all met them. These are the Christians who either state or imply that we who do not follow their leader are Laodicians, (lukewarm Christians mentioned in Revelations) I really like this article I came across describing the way legalism is something to avoid. I have found this most prevlent among those who want to follow some sort of strong leader (usually charismatic in some way). They deny that they have given up their own discernment, and yet will never wander outside the territory the leader has marked for them.
Here is the original aricle.
http://www.thepropheticyears.com/comments/The%20dark%20side%20of%20Christanity.htm
Here is the same article, word for word, with emphasis added by me.
http://www.germanangora.net/xtian/Legalism.htm
See if some of these churches are not very familiar to you.
In Christ,
Donna