Hopefully, I'll save myself a few heated responses by asking that you not answer this question with a question. Believe me, any hypothetical scenarios you've thought up, I've already wracked through my brain. If you don't heed my words, then I will be sure to take you on since we must, by the creed of this subreddit, "Debate all the religions!" :D
It's been over 7 years since I stopped believing in all myths, but I still remember it well. The only thing I used to think about was my day to day experiences. I wanted to make sure I was being a good person, and I was told that there was this being that could see everything, everywhere, and he would judge us when we die, but no one can point him out since he's everything. Well, alright. I don't want to mess with that!
I'd like everyone to know that, beside my upfront demeanor towards religion, I have kept the part of me that strives to do good; in fact, it may be what drives me to be abrasive in these events. I even use my turn signal when no one's around just in case!
I wrestled with the unanswered questions as a kid. Ones like, how does prayer work, why is the universe cruel to the innocent, or why doesn't god just simply answer back? For such a powerful being, you'd think he'd be able to learn English. These are questions that require not just faith, but a disregard for logic, and obviously science and philosophical debate brought me over to the dark side. When I became an atheist, the biggest impact that it had on my life was that I was no longer concerned with just myself and my judgment. I was concerned about everyone else and how they were living their lives based on the various stories they were told as a child. I began to think in much broader terms, but, most notably, I started to see the terrible decisions that society was making because they were trying to protect their beliefs.
Religion and belief is so overpowering that consequence and prosperity are thrown out to make way for individual interpretation and not unbiased pros and cons: stem cell research on non-fetal cells, teaching the book of genesis in public schools as a scientific hypothesis of the universe's existence/contrasting the theory of evolution, and even extreme examples like witch-burnings in Africa and children being denied medical treatment over prayer.
Do you at least see the negative impact that religion has on society; on the world? To some extent, you are grouped in with these people, the people who are making decisions based on nothing but their beliefs. Maybe the decisions you make that are influenced by your religion are mundane; that's how most people live their lives, but where is the line and when do you cross it?