As far as i'm concerned, if all you focus on is your grades, you should be less considered then someone with a lower GPA who has spent quite some time doing additional activities. You got a 4.0? He got a 3.5? But he also volunteered with various non-profit organizations, he was an active member of the school and could be easily seen as a "leader" and will better the college's community.
Only when all things are considered. Someone doing these things for school can not be viewed in the same light as someone who does those things outside of those reasons.
Volunteering at a non-profit organization for the sake of getting into a better school does not display the same quality of selfishness as volunteering out of your own good will. And being an active member of the school displaying leader qualities is not telling about a persons worth in the interests of a college. Not all jobs require you to display leader skills and people come with all sorts of personalities and skill sets. Being a good leader is a good skill, but in on itself someone with good leader skills may not perform as well in other skills. And in the same way you have those who may not be as good scholars as others but better leaders an of course we need those too. So it might make sense to desire people with a drive but that should not be a part of outside of base education qualities. Rather there should be classes where leadership skills may be useful and then a portion of the final grade for that class should be about leadership qualities.
Also some people may never really display their leadership qualities except when put into situations that require them to show off that they can be organized and that they can interact within a group properly and even manage a group of people. Not to mention life for some outside of school may not allow for them to spend time on extra work. There are those that have to take care of younger siblings, household matters or other things. I for example would have to be at home after college if my mother could not be there to look after my little brother with Asperger. If I lived somewhere that would require me to attend extra activities outside of school to have a better chance to get into college that would be penalizing and in poor taste I say.
What about a guy with a 4.0 and a guy with a 4.0, was in USB, volunteered at a homeless shelter, and played tennis? Who do you want?
If I get to answer that one I'd say I'd want them equally as much. What do I know about the guy who did not attend all this extra stuff anyway?