An interesting episode, which is once again ruined by a questionable "I am the captain" decision by Janeway at the end and thus leaves a bad aftertaste.
After being plagued by memories of a gruesome battle in which they apparently murdered innocent settlers during a rescue operation and then covered their tracks, the crew comes across a transmitter on the planet in question, which was built there as a memorial 300 years ago. It has since transmitted these memories as a vivid reminder to everyone who comes near this planet.
Chakotay, Tuvok and the others want to end the transmission because the memories caused trauma to the crew and Neelix almost shot his friends when he began to hallucinate. Who knows what such mind manipulation can do to species that are less mentally stable than Vulcans or humans. In addition, it is impossible to predict what long-term consequences these terrible memories that are now burned into the crew's minds will have. However, Janeway isn't convinced to simply shut down this memorial. Instead, she ensures that it will have enough energy to send its message for at least another 300 years - and has a warning buoy placed around the planet to warn other ships of what they are getting into.
It is important to remember terrible events in history so we do not make the same mistakes several times again. However, you also have to have a connection to these incidents and these cultures. In six years, Voyager has passed countless planets where numerous atrocities and war crimes have certainly been committed over the last 300 years. If Janeway had stopped every time to remember those killed and fallen, they would probably still be in Kazon territory. In addition: The crew has no connection to this planet or its former inhabitants. Even with knowledge of this event, they will not be able to prevent any future conflicts in this civilization (if it still exists). And it was probably drilled into Starfleet officers at the academy that innocent civilians should be protected and not shot at. Torturing them with traumatic images is nothing more than coercion. They aren't going to become even better and more moral beings in the end by just reliving these memories as if they were their own.
Janeway probably had to make the decision to keep the transmission active in order to reinforce the moral message of this episode. Logically speaking, however, a Starfleet captain should have acted differently. Janeway could have simply placed a large plaque at the memorial with the events written down for posterity. Or an audio and video recording. There is no reason to simply allow a potentially dangerous mind-manipulation machine to continue transmitting.
