It's worth it. With the field disperser the robots can't bug you any more above ground, unless you poke around in the upper levels of the correctional facility. You should concentrate on getting the very best weapons with your credit. Stop off in the south subway to find the transporter guidance device. This is a surprisingly effective strategy at any point.
Robots have to recharge a lot, and they die out.
Just walk past them then. I'll tell you what this means later. There are access terminals that give deactivization codes so you can win the game. Asking around at administration tells you they're behind Marion's office. It's one of those doors you need 50 endurance to break down, but don't worry.