I've now completed the Beachhead Expedition twice (on PS5 and PC), and both times I encountered trolls who thought it would be funny to try and seal off something from other players. From crashed ships boxed in via a base to Traveler graves either boxed in or even erased via a carefully placed comm ball.

If you come across something like this, it's trivial to defeat. For a base, report the base and it will vanish, allowing you access whatever was hidden. To report, either access the base computer or bring up your build menu, then bring up the secondary delete/color change menu and go to the right. You'll find a report option there. Highlight a base part (if you can't access the base computer) and report it. Same thing with a comm ball. If the object you're seeking has vanished, save and reload after you've reported the base/comm ball and it should reappear.

If you're one of the mouthbreathers who thinks this is funny, it's not. It's a jerk move that annoys experienced players and frustrates beginners. Don't do it. Remember the words of the Wyld Stallyns…

Be excellent to each other, and party on dudes!