This is something that has really been getting under my skin lately. I am sure that everyone knows a person like this.
I can't stand people who hide behind God and still do as they please. Just because you walk around saying "God bless you!" to everyone doesn't make you God-like. Really, you are more like a hypocrite.
Seriously, if you were going to live your life as God intended for you to do, would you still have such a hard time interacting with others? Also, I don't think that God passes judgements onto others so you should check yourself before you start down this road.
The preacher sort of fell into this category also. Just because you are saying that eventually you will be teaching God's work doesn't give you free reign to be an @$$ and to treat people like shit.
So before you start spouting the Good Word, take a good hard look at yourself and your actions and see if you are worthy to speak them before you actually use them.