im not sure if you understand the Problem.
If a group destroys a Structure, the attacker and the defender can loot the wreck with no going suspect. (obviously both sides have to fight for the loot if the both sides on grid lol)
Third party pilots that are not in war with the structure have to go suspect to loot stuff.
Third party pilots (in some random ship) are looting the wreck, moving the loot directly into a second third party pilot in a DST. Pilot A in a random ship goes suspect, sacrifice his ship (eg. a shuttle) but the loot is safe inside the DST.
If you are suspect, you cant drop loot in fleethangars if the the ship (with the fleethangar) has his safety green. If the ship with the fleethangar has his safety yellow or red, it also enters suspect time when a suspect drops something into the hangar.
This method is already used for all other interactions with a Suspect Pilot, eg, Boosting, Remote rep and remote boost.