Believe me, Daunt, I don't categorize people as atheist, agnostic, or anything else in my relationships with them. Personally, I don't like labels--I don't like the way they divide people. I only used those terms in this thread for convenience. I notice most non-believers here use the term atheist for themselves.
I don't judge people (that's not my place) and I don't try to save them (I don't have the power to do that). Everybody has a right to their own opinion and I respect that. Everybody believes something. Ususally, I find that most people adopt a position that is not well-researched or thought-out, and this applies to professing Christians and non-Christians alike. I encourage everyone to investigate their position further. I'm always open to learning new things. (I will admit that my nearly lifelong experiences as a believer provide me with enough evidence for my own satisfaction, but I also realize it is subjective and thus not valid as proof.) It's been my experience that most objections to accepting God are not grounded in a proper understanding of what the Bible claims, and I attempt to answer those objections as best I can to individuals.
I think I need to clarify something I said earlier about "No God--no standards." What I actually meant is NOT that people have NO standards, it's just that they are free to set their own. It's comes from the survival mechanism we all have in our brains. The person's mind blocks any consideration of the existence of God because if it accepted that a God with standards existed, it would openly have to accept or reject those standards, but the person wants to be free to make choices that are outside of the standards. Therefore, in order to be free to do whatever one wants and be right about it, the existence of God is denied. It's like, "If there's nothing wrong with me, then I don't need treatment. I don't want the treatment. Therefore, there is nothing wrong with me."
I'm not saying all non-believers use this approach.