I hear a lot of traitors talking about being terrible and their robotic sidekicks bailing them out. It's starting to become a theme.
Cyborgs are incredibly powerful, so it's not surprising that the robots are able to bail traitors out, especially if the traitor is the RD, who is one of the only people with access to the robotics console that can shut the cyborgs down. When emagged, they get special items. For a 3 telecrystal emag, you can give cyborgs energy swords (standard), poly acid spray (medical), stun batons (engineering and mining), lube spray (janitorial), or even chloral hydrate beer (service).
Oh, also, security cyborgs get lethal lasers that recharge. I'm not a fan of rogue cyborgs. A decent emagged security cyborg can murder a large portion of crew before being disabled or shut down. I'm not a fan of rogue cyborgs at all. If a traitor roboticist can remove the robotics console and emag two cyborgs, he can switch them to security and janitorial and wipe the floor with almost all the crew, unless someone miraculously manages to get another console running (not sure if it's possible. I don't really play scientist any more). Or hell, even a standard cyborg and a janitorial would work fine.
Did I mention I'm not a fan of rogue cyborgs? Because I'm not. They're incredibly powerful allies, and it's almost always worthwhile to grab one as a buddy for traitor, if only for the added protection and/or access to the entirety of the station.
EDIT: Looked at the "electrified arm" sort of stun baton for the borgs. It's not as good as the stun baton, but it's still pretty potent, especially since it only takes 30 charge to use, which is very minimal for any borg who's not using a tiny battery.