they probably will notice it (with a 1% chance lol) but they won't realize it. 1.4.1.2 is the last update, the only thing next is 1.4.1.3 with bug-fixes.
the only place where it can be done is mods. probably it will be added to Wacky NPCs Mod.
also if you want it to be realized somewhere, make sprites for it, shop, description of items if there will be new, also sprites for them, sounds of course.
your suggestion is pretty interesting but it doesn't contain the needed information.