Or for a game, where it's part of the interface.

Got an example of what you mean? Because if you mean the only thing I can think of, I very strongly disagree.

	▲	wtallis 4 hours ago \| parent [-]
		Hijacking native scroll behavior to badly reimplement anything remotely like scrolling is wrong even in a gaming context. But if you're implementing Half Life 2 in a browser, where the user no longer has a normal cursor, then hijacking scrolling to implement the weapon switcher is fine.