Treating this like a game where we need to find a way to abuse the rules, and not a serious thought experiment:
How indirect of a kill can the actions be before they're allowed, given the whole butterfly effect situation? Can I magic someone's car keys away so they find themselves walking to work instead, except if they do so they happen to be killed in a traffic accident? If I can see into all possible futures someone has, then I can guide them towards a swift death through indirect means.
Like say I made sure Seth McFarlane didn't accidentally miss his flight back in 2001. Would that count?
Can you banish someone to a desert? What about to Africa? What about to Detroit? What about into a coffin underground? What about into a building that's about to be demolished?
One hundred years from when I last harmed them, or one hundred years total? If it's the former, then I can keep all loved ones alive as long as they desire by inflicting some trivial harm to them every few decades or so. If the latter, then if an enemy target is older, the extra decade or two of lifespan is of no significant consequence when they're able to be endlessly fucked with.
What constitutes 'harm'? Would making someone infertile count? What about magicking away all of their assets? What about giving them a revelatory vision (or maybe a sequence of carefully manipulated events) which overthrows their entire system of belief?
Why not bring upon a woeful mental illness on your enemies that leaves them completely unable to function (and put them all in some barren location together while we're at it)? Whether or not they live another 100 years is a triviality when you can offset whatever drain in resources they cause.
All very good questions.
First thing I should say is people have wondered whether or not the public at large will know about you and God and these rules and stuff...
They would only know what you choose to tell them. Meaning the only way anyone knows about the 100 Years thing is if you chose to divulge it.
On that note:
I already said this in an edit, but just to reiterate, the 100 years thing is not perpetual immortality. It means 100 years
exactly--as in, if you find a 25 year old and shoot them in the crotch, they get to live to be 100.
But that does
not mean they drop dead the minute their 100th birthday comes around. And like people have glommed onto, they aren't exactly invincible for those 100 years. Weird issues like "what if you harm someone who is 101?" or "what if I harm them when they're fifty but then they're at ground zero during a nuclear attack when they're 70" are probably things God would have to handle on a case-by-case basis (and if you think that sounds like a lot of work, keep in mind God is literally immortal and can be in multiple places and times at once).
And yeah, God's gonna be monitoring this, because of course God is gonna be monitoring this.
This probably answers a lot of your questions right there--the fact that there's an intelligent force (in fact the ultimate intelligent force) keeping an eye on things. It's not just a magical algorithm, but an ultimate being making calls on a case-by-case basis... a being that indicentally can totally be in multiple places at once and look directly into your heart, mind, and soul. There's no trying to Rules Lawyer this being.
But to answer one more important question: You don't have future vision. You are not the Kwisatz Haderach (though you can still terraform Arrakis if you want to--fuck the Bene Gesserit).
From what I understand of God (and keep in mind God's the mindreader, not me), a few things matter a lot: One is what was actually going through your head when you made a choice. Two is the end effect. Three is how the people on the receiving end felt about it.
So..... stealing the guy's car keys and forcing him to walk, but he gets hit by a car? You couldn't have known the hit by a car would happen. So its ultimately gonna come down to why you took the keys. If you had an actual good intention somehow--say "I wanted to help this guy lose weight and get healthy"--then you're probably off the hook. Probably.
If it was nothing more than you wanting to dick with the guy though? He gets to live to be 100. Certain niche situations ("what if ten years later, the guy gets his head blown off?" or "what if I hurt someone who is already 101?" for example) will likely be a case-by-case basis.
But for cases like:
"Yeah, I teleported Anita Sarkeesian straight into the Marianas Trench, but that technically wasn't
me killing her--" not gonna fly. This is God you're dealing with, not Johnny Cochran. The very minute you've started trying to spin technicalities, God's already undone your action and did I mention the Almighty (never underestimate what that term "Almighty" means) is a mindreader? I think in this case, God wouldn't give Anita 100 years, because God would make it so you just never tried to teleport her at all.
"I teleported Anita into the middle of a mob of antifeminists--" Anita gets to live to be 100. God might even give her benefits just because you were nakedly malicious.
"I casted a spell on one of her speaking engagements where suddenly anyone who heard/witnessed this speech had lie detector powers for just this one engagement..." This is a tough one. My guess is Anita would get the years but not any other benefits. As for the audience that got the temporary lie-detector powers? Case by case basis, but I would imagine none of them are getting 100 years.
"I forced her to live on an artificial island where she's the only feminist--" This one will depend on how Anita herself comes out of it. Like if she came back and she was all like "this was the best thing that ever happened to me!" then no harm, no foul, she does not get the guaranteed 100 years. (And like I said, God is a mindreader... God would know if she's faking it just for the lifetime benefit).
.... I'm not sure if there's any questions left to answer, honestly.
