Can hitboxes be made visible on Halo PC/CE?

I got the idea from watching a Team Fortress 2 video showing hitboxes (which were unconnected to the enemies/bipeds due to lag, just like Halo PC/CE. However, TF2 has "cl_lagcompensation 1")

http://www.youtube.com/watch?v=s4RXsDj8bkY

If 3rd Person Apps and Sightjackers (and unfortunately Aimbots) can be made, could visible hitboxes be possible?

Or do the "actual" hitboxes (the place you have to lead your shots on your target) not exist at all and are the consequences of inferior netcode?

Note: I am not talking about chams or wallhacks. These hitboxes are located at a point where someone would have to lead their shot to hit an enemy.

I.E. Enemy is moving left, visible hitbox is located at Enemy's left.

Enemy is standing still, visible hitbox is located on Enemy.

Enemy is moving right, visible hitbox is located at Enemy's right.