Community service is important in ones life, but not important enough to make it a requirement to graduate. I believe that when someone does community service, it should be because he or she wants to. Community service shouldn't be forced upon ones life, but it should be encouraged to do. Forcing people into doing things sometimes tends to make them think less of that thing.
After doing something that you know is right, you feel great and gain self righteousness. Sometimes after doing something good you want to go do more of that. When you want to do more of something you know that it is something that you would enjoy doing for a long time. That feeling is something you should achieve on your own, not something you are forced to do.
Enjoying something you have to do every day is important. If you don't enjoy something you have to do every day, you won't be happy. You will be miserable. A miserable state of mind isn't the way you particularly want to feel. When doing something, you want to be able to do it without thinking bad thoughts about it. Community service won't make everybody happy, therefore it is not the way to go to get kids to do community service.