We have this in Sweden, and I always thought every cheerleader in the world had to keep their nails short. I think it's a great rule with a clear purpose (it hurts getting scratched!).
Another rule we have in Sweden is this:
"Hair color is to look natural. However, coloring parts of or your entire hair in your teams colors are allowed". What this means is I can have bright orange hair, but not green or blue. Meanwhile, @
youbetterwork could have bright blue hair but not orange. I don't know if there has been deductions for this, but it's in the rulebook and I think it's a weird rule since there are no safety issues connected to hair color.