I'm not sure about checkpoint delta but either way Alpha is way more convenient and Alpha is the most used by civs and such I would enjoy taking over Checkpoint alpha and charging civs a toll/robbing them.
I think it would be a great idea to allow independents to raise and lower the barricades at Checkpoint Alpha and Bravo. Also independents already get paid 20,000 to man the checkpoint so I think its only fair that we can do it not just Blufor/Opfor.