Yeah, I've never understood people who have figured out that their "one true religion" was a man-made fraud only to replace it with another one. I just can't get my head around the mindset, it must be todo with needing that crutch in your life.
We used to put up with the preachy types more than we do now and tried asking them to tone it down but to be honest, it was pointless because they frequently have no self-filter. I think the "god be with you" blessings and stuff are really often used to antagonize people and if they can't limit their own expressions then we have to help them with it.
As I said though, I have no problem with people wanting to discuss the concept of belief in a sensible way and what evidence there is or isn't for the existence or non-existence of god etc... but if they want the communication to be in one direction and expect us to just be here to listen about how great Jesus is then the deal's off.
Besides, everyone knows Jibbers Crabst is the only true lord and saviour.