So at the end of the adventure you come across the queen of the of a brood on neural parasites, who offers to take over the Romulan race and make a peace treaty with the Federation in return for sparing her. Everyone controlled by the parasites had generally shown no indication that anything of the hosts mind remains behind. So if I accepted the deal the Romulan race would be effectively wiped out.
I was 1st officer on the away team and the players were discussing, if we should kill the queen which would kill all her brood as they were all linked, because it would condemn this species to death. Or we should incarcerate her and look for a way to modify the race to become more like the trill (which they were already researching).
It seemed from my perspective, you either wipe out the Romulans, this parasite, or genetically modify them (effectively playing god with the species anyway). My character had the Hate's Romulans trait so was very tempted to agree (although some free Romulans had helped us earlier). Accepted all the evidence pointed to this species not being remotely trustworthy, even though they were "just looking for a new home" so there was no telling they would stop there. Also containing them would be very difficult, while the queen was still alive her brood could keep recruiting as there was no telling how many were already active in the Romulan Empire or the Federation.
So in the end I told the crew present that this decision rest on me as the commanding officer present and if anyone wants to make a complaint in their log to high command they should feel free. Set my phaser to deadly and shot her.
Setting of a chain reaction killing her brood and any people (mainly Romulans) infected by her brood of neural parasites.