I visited the Unity Day system a couple days ago. Managed to find a wild base computer (no longer required but I like the challenge) and put up a small base for giggles.

Swung by a couple of the other player's bases on one other planet in that system. Did not land at any of them, simply sightseeing.

Now, however, the Other Player's Bases teleport list is populated with entries for every base that was in that system, even from planets I was never near. It doesn't hurt anything since as I understand it the current limit on teleport destinations exists for each category and not collectively. Annoying, though.

FWIW, I do play "online" but with networking turned off. I can see (and upload) bases and upload (and see) discoveries but I'm free to explore without having to keep an eye out for griefers.

So, any ideas on how to de-list some teleport destinations? I suspect that the save editor is the only way.

Update: Since this is 2020, one should expect the unexpected I guess. I logged in and checked the Other Bases teleport list and ... they're all gone. Except for one. I can't explain it. I swear they were there the last time I was on! So, secure from the drill. ::sigh::

PS. Among the plethora of bases was the infamous Likholu. It's also gone now but I'll confess that I was tempted. ;-)