Now in terms of Original Sin, just what danger if any does it pose? To be honest I do not believe it exists, but I appreciate the fact you probably do believe it exists. Therefore my question, what danger is it?
Not sure if you're using the Catholic church idea of Original Sin, but I think the term can lead to confusion.
What would be the first sin ever made according to the Bible? Eve followed by Adam when they disobeyed God's command. What was the consequence? removal from Eden and God's presence. Although I don't think we are born with sin, we surely are all sinners by default. It's deep in our genes, I mean, if I tell you the first law I'll make is to not think about a red hammer, the first thing you'll probably be thinking is a red hammer, not because you want to piss me off and break my law but because we're all hardwired that way.
If you ask any young kid between 5 and 9 years old, give or take, what they wish for, most of them will answer you something as happiness for everyone, world peace, etc... anything for the greater good of mankind. Yet, as they become older, they slowly start to wish for themselves and less for others. It's like that for everyone. We're all slowly drifting away from God's goal, from His presence.
I can make an analogy with my own life and Adam's: I was born close to God's presence, but I chose to disobey because it felt rewarding at the moment. We're all finite beings so we all want and search for easy pleasures now that contradict God's law. We're all Adams and Eves on our own falling away from God. That's the danger of what you would call Original Sin. You might also think of it this way: if death sentence was mandatory for any of the 10 commandments broken and God decided to enforce it right now, this moment, how many people would die this instant? (it's a rhetorical question just to get you thinking about the seriousness and the universality of sin)
As for when one should get baptized for salvation, how kids get into this is complicated matters. I'm no doctor of theology but my guess is that when the person is ready, God is waiting. Some people have said that when you are able to discern good vs bad, it is a good time. It took me 28 years.
Every single human being has sinned, sins, and will sin, not counting Jesus of course. Don't know if that's "Original" enough for you. Hehe, just made a pun. Doubly original, whabam!
Anyone is welcome to add or substract from what I said.