It's an interesting hack, but there's a rather obtrusive bug I noticed during multiplayer.
Anytime someone uses a mount, including mine carts, the particle effects that appear whenever they first use the mount are spammed on your player character ad nauseam until everyone on the server is no longer using a mount. Fortunately, it seems that it's only on the client's end and that no one else can see these particle effects.
I'd post a screenshot, but I'm unfortunately not allowed to post links.