The only good thing that I have seen come out of the double first base is now there are not nearly as many three foot lane violations. The runners know that they need to get to the colored base and no long have the argument "I just went out of the lane at the last second to step on the base." Other than that, the rule is a joke. It's an even bigger joke to think that a defender can retrieve a ball on an errant throw and come back to touch the colored portion. Awarding the defense with another 15 inches because of an errant throw? Ridiculous.
I don't see any double bases in boys games....