those guys are:
NickGurs Lyncher
Nig-ger Washer
They also insult me, using sexist language because i'm a woman, the gm mute them, that's ok, but yesterday they spend 7 hours trolling and the still here now doing terraform around my base.
My suggestion is blocking terraforming from 1 tile more on a personal claim and only allow terraforming to the owner and friends on that tile, any can loot or grab a horse but not terraform.
Check the screenshoots
Spoiler
