I have spent a limited amount of time (I’m guessing nine hours total) in “Trig Invasion” space, in a helios (covert ops) and a thorax (cruiser).
I used the helios to scout and observe player interactions, and evaluate whether, during my time zone, ninja salvaging was occurring and to what degree. I did witness characters salvaging other characters’ wrecks, but only after the wreck owners/creators left sites. I never witnessed characters “stealing” salvage while the dps players were onsite, though there are wide spread reports of this happening.
Invasion entities seemed to take no notice of the helios, either on the gate, uncloaked (note, I did not linger at the gate), or in the sites (cloaked)…with one exception, I was cloaked watching a named invasion entity…a Zora something or other, and by watching I mean the active looking option in the interface, and not just the general watching the battlefield option…and from the moment I started “actively” looking at this entity, this npc left the npc group attacking the dps player and slow-boated in my direction. It was the only npc that did this. I was astonished at the behavior, as it seemed to “sense” my ship. It completely ignored everything else happening on grid to travel in my direction, and it continued to slow boat in my direction for well over 35 kms, until I ceased “looking at” it. Once I returned to the “look at my ship” option the invasion entity returned to the rest of the npc trig invasion group battling the dps player character. Whether this was a bug, or unintended chance based behavior I’ve no idea; but, I have never seen another npc “appear” to be aware of a covert ops ship in covert mode in game.
As to the thorax, I had read a player could continue missioning in an invasion delineated area. Now, I don’t mission but I wanted to test the accuracy of this statement, so I ratted until I got a DED escalation in “Trig Space” and ran the escalation, in this case a Serpentis Narcotics Warehouse. This DED as it happened took place in the invasion origin system, so I had to travel through two other invaded systems to reach the site. I met invasion entities on the gates (again, I did not loiter, but travelled through as quickly as I could) and was not attacked, despite at times there being a full compliment of invading npcs hovering around the gates. I think the closest the thorax ever came to one of the invading npcs was between 3 and 4 kilometers. I particularly watched this as I was expecting to be attacked at this encounter, but the ship made it through the gate.
I D-Scanned on a regular basis while running the escalation and could see the npc trig invaders on d-scan, but at no point was the escalation “invaded”. In the end, I scooped my loot, left Trig Space and had no encounters with the invading npcs, whatsoever.
Having written all of this I do want to point out one, what I feel to be, Important fact: this was the first time I had interacted in any manner with the Triglavians. I’ve never run an Abyssal site. Since a lot of the game’s interactions are dependent upon “standings”, my lack of “standings” may or may not have played a part in my experiences.