Over at Reason Radley Balko asks some good questions about Obama’s proposed corvee for the young:

[Obama] wants to mandate 50 hours of community service per year for middle and high school students.  And he’s offering a $4,000 federal-funded tuition credit in exchange for 100 hours per year from college students.  For most students, the latter will become a mandatory part of getting a degree, as colleges will merely raise their tuition to compensate for the vouchers. 
So who gets to decide what constitutes “community service”?  Who gets to decide which causes and organizations will be credit-worthy, and which ones won’t?

Something tells me that you’d be more likely to get one of Obama’s vouchers by going door to door for one of ACORN’s living wage campaigns than, say, volunteering for a libertarian nonprofit organization that advocates against things like government-mandated community service.