There is an interesting post over on Steve McVey's Blog. I thought this was good:
Sadly, those trapped in legalism see themselves as having reached a level of maturity that the rest of us haven't achieved. The truth is that they are still babies. Paul wrote in Galatians 3:25 that we don't need the Law as a "nanny" anymore. We have Christ and He is enough!
We can determine something about the level of our Christian maturity by how connected we still are to religious rules in our lifestyle. When I was a young child, I had to be told to brush my teeth and bathe. Nobody has to tell me that now. The same is true as we mature spiritually. Some churches are nothing more than child-care nurseries where Christians are treated like babies, being told exactly what they should do and not do in every area of life.