Hey there, welcome! 
If it’s a really nasty issue, where eg. the spawn is entirely blocked off, you would be able to report it as haressment/griefing, as linked here: Useful links - Official Conan Exiles Wiki
Maybe one of the moderators does know if that’s worth it, not sure.
Note on the wiki on this one, not really important.
PS: On the forums it is against the Community Guidelines to report players. I assume you already know this.