I haven't seen anyone else do this, so I thought I'd share with everyone. This opening route can earn you a lot of points (125 per enemy) for your scorestreaks at the start. I'm sure a there will be some members complaining that I didn't jump on C flag at the start. You don't need everyone on your team to cap the neutral flag and the spot I'm at is where I Tac Insert so I can easily hop on and/or defend the B flag.
Yeah, I did the same thing in BO1. Also, from the same spot where I through the C4, you could C4 into the top part of the A flag building over looking B to take out anyone up there. Unfortunately there is a huge wall that is too high for a C4 to go over (or at least I havent found the right angle yet), but you can easily toss a frag or semtex into it.