From my (limited) involvement in helping with tournaments, I don't think it's a good idea. At best, add another class to see if there's enough interest to keep it going.
It is a help--like someone already said, it's the original release aid. People used them for a reason. IMO, you'll get a very few that learn how to use them properly, and if/when they start winning there's going to be a big stink raised about how it's not fair, etc.
My bet is there will be very few who use them, it will open the door to arguments about using other "primitive" release aids (I have one made of leather), about what is fair in a class, etc. and generally be a lot more of a headache than it's worth for the folks running the shoot.
Chad