Then there's always bigger killstreaks like the ceph gunship, which obviously would be a lot harder to hack if you're exposed due to it's large damage bullets/bombs/whatever you wanna call it. Hacking this would require/encourage teamwork in one of two ways. You could simultaneously hack it, which could speed up the process. Or you're team could distract it while you hack it. To sum this all up, I think the electronic hacking ability in multiplayer would make Crysis unique and give it a "fun" atmosphere while also encouraging more team work in game modes like TIA, AND differentiate it a little more from COD.
Thoughts on this?