NYSC: A blessing or a curse?

Some people are clamouring that the NYSC scheme should be scrapped.
What is their reason?

1. It affords the youths the opportunity to add value to the community where they are serving (Corpers have provided school equipment, health centre, borehole etc through the scheme)
2. Afford you 1 year allowee (if well utilized)
3. free career development & entrepreneurship training (the part i love most)
4. Opportunity to network with people from different background, status and expertise.
4. Opportunity to get free work experience and be retained (sometimes) at your place of primary assignment
5. Opportunity to reach out to the poor in remote villages (rural rugged)

Or is there something (disadvantages) I am not seeing?