Yes, there is a point. Just remember it is all about patience and presentation, especially patience. Don't ever actually argue with them because then their pride will become involved and your task will be impossible. Just throw in little thought barbs--the things they obviously never thought of--and walk away. Let them think it was their own inherent intellect that came to the correct conclusion. (Religion is driven primarily by pride.)
Usually, the cracking sound is made at home, never in front of you. When you speak to someone with a different opinion they might consider it and in the long run that idea is the driver.
My best approach so far is the friendly atheist coat. Just don't be a jerk, don't be passive, don't be militant, be friendly to the person itself but not to their ridiculous beliefs. Overall, you add patience to the mix and you can crack through a message or two.
Yes, religion is the scourge of mankind. It is a tool for repressing our natural sense of morality. It blinds the believers for the benefit of the charlatans who manipulate them.
I have found this to be quite good. I have adapted it since I first posted it. Instead of challenging theists, especially the Fundies directly, it is almost forcing them to challenge themselves.