Please don't mess with the scroll event.
I also don't understand why there isn't a browser extension to prevent scroll-jacking effectively? "No more scroll jacking" on the Chrome store seems to, but annoyingly you have to hold a meta key for it to work.
They're usually trying to create smooth scrolling. The problem is, it never works in every browser.
> I also don't understand why there isn't a browser extension to prevent scroll-jacking effectively?
It should really just be an option in the browser, even if it's in a fancy hidden advanced settings page.