I personally think that it comes down to every DM's individual campaign. While many (if not most) players out there would rather leave that aside, I think that it would be a great addition to an adventuring party. There are some points one must consider:
1- How many individuals are in the party. While even a single individual could pull it off, I think it's quite obvious that a party of at least 4 or more would have an easier time implementing this.
2- The alignment of the party. An evil party would have a hard time doing this, but even an evil party could see the benefit in pulling this off. Of course, if you have a CE player only bent on total chaos, you're going to have a problem.
3- The racial composition of the party. Gnomes and half-orcs would be the most probable to benefit from this, while elves and dwarves would see little if no use at all in it. YMMV.
All this said, I think that would make for a great house rule. I would be curious to read what other people think...