This doesn’t happen. Not only are the rookie systems off limits to messing with new players, so is the whole starter Sisters of Eve epic arc.
New players aren’t often killed in highsec. Only a fraction of players are ever killed by other players, and of those, only like 10% are in highsec.
I know you mean well, but you are trying to solve a non-problem with your ‘think of the children’ talk. The only thing making >=0.8 space would do is enable greedy, multiboxing veterans the ability to grind those resources in safety, making it tougher for the true to player to eek out a living there or even pushing them out into more dangerous space.