DrizztLink posted... Sure you can.
Crouch, Sandy, zoop over, turn it off. You can't hack through them but you can't hack when not using them so it's not exactly missing out. You can still take them over at a computer and use them to mark enemies.
Hacking only matters with an actual computer on very limited occasions, I can think of exactly once offhand and it doesn't matter.
Reminded myself of another stealth point:
When you knock someone out, hiding the body in a box or dumpster kills them. If you're going through a mission and aiming to not kill anyone, you cannot hide the bodies. This is only super-relevant in 2 missions I can think of (One side quest in the NE of the city, one Gig in Dogtown), but it's good to remember.
True about hiding bodies. I always assumed that was a bug, but its good to know.