Actually, much to my surprise and recently - because of it - much research on the subject, toilets, drains, storms, tornadoes, etc. actually DON'T rotate the opposite 'south of the border' specifically. It is a common myth. In fact - storms can rotate both directions in either location on rare occasions.
The Coriolis effect does exist, and does effect the environment - and at measureable levels, but none so noticeable as reversing rotations on a scale readily visible to the naked eye without instrumentation.
I know... me too.