Anyone know of a landclaim glitch where you can place items in enemy structures?

There’s been a really suspicious player on our server lately who I think is a spy for a wiper clan we recently beat.

He’s been going around asking people to trade stuff and builds/uses Yamatai. I just came back to my base recently and found two Yamatai pillars attached to the foundations outside. Hardly anyone else had been on the server, and I checked that no one in my clan had done it. Plus no one in my clan has Yamatai DLC.

They were placed in a spot which would make them very visible, like no attempt to hide them.

I’m wondering if there’s some landclaim glitch since we know this clan probably wants to get back at us somehow.

PS4 Official Server

Thanks for any info

They could be an Ark player

Huh?