Anadromous Is it purely how cold he is running that keeps the swarms from attacking him, or is there some other mechanic (like distance from the interceptor) here I'm not aware of? I was playing around trying to biopsy interceptors in Delphi yesterday. The main thing that killed me (over and over and over) was activation of the attack behaviour of the swarms. I was diligently keeping temperature below 20% (cold running DBX with heatsinks as I approached 15%), but there is no way I could have just flown through the centre of a swarm, like he does a couple of times.
I managed to sample Cyclops 3-4 times and a Basilisk once, then decided perhaps Ram Tah's second mission was going to be too much of a pain and went off to other things.
Thargon Swarms
General Swarm fire is inaccurate, particularly if you are running shieldless, and generally not a concern if the Interceptor is <Medusa. Your running temperature does not affect their accuracy either.
Swarms only fire missile Thargons (their true threat) when they are Agitated. To avoid agitating a swarm do not touch them. If you DO come in contact, and thus agitate the swarm, pass through the swarm again to reset them back to normal mode (it helps to do this immediately AFTER a missile barrage for increased safety).
Cold orbiting is done primarily to avoid the Interceptor's fire (Temp <25% and moving away from the center of its 15 degree firing arc). Ideally it is done in a direction that also avoids the swarm but stuff happens. You might have an easier time with a Long Range+Thermal Vent engineered Beam Laser to keep you cold.