Visible crew/equipment: When Matrix is holding Sully over the cliff, you can see the cable holding him up. (00:40:51)
Visible crew/equipment: In the scene where John uses a Caterpillar to enter the scuba and guns shop, the driver is a stuntman, in both slow or normal motion. (00:51:45)
Visible crew/equipment: When Matrix and the girl are driving out of the parking lot you can see the camara crew in the reflection of the car. (00:29:54)
Visible crew/equipment: In the beginning of the movie where the 2 men murder the guy in his robe, just after they finish firing in the background you can see a man just standing there to the left of the screen behind some trees. (00:02:00)
Visible crew/equipment: In a scene towards the end, you can see the two bad guys flip into the air, and see the air ramps they fly off. (01:13:24)
Answer: Possibly so any surviving enemies they encountered on previous missions and or tours of duty couldn't hunt them down and kill them for revenge.