As per the title.
Those flying trade routes might inadvertently fly through a combat zone and be totally unequipped for an agressive Thargoid interdiction. If the target system is involved in the Thargoid war then that's the players choice (and probably shouldn't be filtered out).
The picture below shows the Maelstrom involved in an a route plot (constructed to show the issue, max range jumps would have the same behaviour).
Those flying trade routes might inadvertently fly through a combat zone and be totally unequipped for an agressive Thargoid interdiction. If the target system is involved in the Thargoid war then that's the players choice (and probably shouldn't be filtered out).
The picture below shows the Maelstrom involved in an a route plot (constructed to show the issue, max range jumps would have the same behaviour).