We mostly have an issue with people naming things like the "Number one gang from Neo York" in their history as a matter of fact rather than opinion.
To contradict Immigrant #2's Number One Gang from Neo York.
Or players trying to define what Las Vegas looks like by saying it has a population much larger than Withmore has (which makes no sense)
The player doesn't need to be world building in their @history, because they're likely the only person who is going to see it from that perspective and they'll meet someone else ICly who has a different idea about the place they're talking about, because players often form RP in huge broad strokes rather than small, individual details about places that only -some- people might know that make that neighborhood unique or something.
I'm from Neo York and Neo York is such and such, rather than I am from this small neighborhood in the sprawl outside of Neo York and it's like this, and you probably didn't know that because you've been been to this particularly small part of the mega sprawl.
So we just need more players thinking on a smaller scale when it comes to world building details in their backgrounds and then it becomes more unique to their character and less interfering with the lore of the game world and other peoples established RP and beliefs about particularly large and significant locations in the world.