First of all we all know that Jagex reads this forum. And eventually, they try out one of the scripts to see what it does. And what do they see first? This screen setup thing.
Note, I was super-safe, using a pretty good script from behind a secure proxy.
I don't say this was the exact fault that lead to the ban, could be the bot or a player reporting me, whatever. All I say is if I was Jagex, I would start listening every single account that resets the screen zoom rate.