Feature Request: multigroup threads
Another consideration is that you've only got 25 threads visible per page, so if you have more than the 30 ships locations that you can make with existing groups (1-9, A-U), that's at least 5 that are going to overflow to the next page, and more if you have any pinned Notices, an OOC thread etc.
Just thinking of the nightmare of the sheer number of rooms you could end up with on say a galaxy class starship - according to my Star Trek - the Next Generation Technical Manual p152, the Enterprise can accommodate as many as 6500 individuals - assumedly the only people who can access someone's personal quarters (a generous 110 sq m, I note) are themselves, anybody else they may have given permission to, security etc personnel using authorized overrides, sentient energy beings, rogue AI, Q, ...
Now the Enterprise rendezvous with the rest of the fleet (let's limit it to just the Galaxy class ones for now) and they all decide to show each other around their ships (that's only polite) ... so multiple the number of rooms (not just personal quarters, but the whole lot of 'em) by the number of ships present (depending on what's currently been recently destroyed and is awaiting rebuild) ...
At which point all the anti-matter universe versions of the ships warp in and start teleporting the crews over to their own vessels ...
Massively, massively over the top, of course (extremely unlikely though not absolutely impossible scenarios), but just goes to show it wouldn't take much to get completely out of hand.
The fantasy world equivalent would be having a different thread for every shop in a large town/small city ... or cities ... kingdoms ... to get us similarly over the top (access would thankfully not be much of a consideration if at all - there hopefully wouldn't be that many establishments with 'Dwarves\Elves not allowed', 'Wizards only' signs up).