A shrine is a place where multiple guilds enemies and allies alike will send a fleet of a single scout ship to honor the fallen. Usually its when a person in someones family that died in real life, they will request people to place a scoutship there. When doing this you can keep it there as long as its welcome. And its actually a cool site to see, when you see 100 guilds represented, and usually you will see guilds that seem to have no heart are always the first on the scene. If your guild is asked to put a scout ship there you do it. It can always give you a better negotiations, and it shows you care and that your condolences are with them. But you can only keep it there as long as its welcome.