I just read the rules and it says that terrorists can only attack traders if they don't pay for passage (tax i'm guessing)
"6.18 Owners of Terrorist IDs have a right to attack:
- Trader ships that do not pay for passage"
Also, Treewyrm, my trader, Fabrica has been shot at and destroyed in a matter of seconds by a Keeper (can't remember name but they were in a gunboat). No nomad or alien cargo / weaponry, not following them or anything. Just doing a regular trade run and saw some Scorpion gunboat heading right toward me.
I was in an advanced train carrying 5000 prisoners from Dublin to Stuttgart through the Omega routes, no nomad patrols, just the odd hessian. Was in Omega-3 when I noticed a Keeper on the scanners, I was confused that a Nomad would be out that far but I wasn't worried. I thought I knew that Keepers only attacked those who harm them, like the Order or anyone else who attacks Nomads (just about everyone in the Omicron systems).
Got really worried when I noticed it was coming right for me, was going to say hello and then it just destroys me, no warning, no reason.
I was pretty annoyed at that, because either you decided that traders carrying human cargo and using human tech counts as harming nomads or that particular Keeper was a hungry for some one-sided pvp.
Other than that I actually like the Keepers. They make it interesting for my other characters.