Click your name in the top right -> Account Details -> Manage Steam Guard -> Deauthorize all devices should stop them from posting on your behalf.

They're still posting sadly.

They're spamming the forums on your behalf with links

https://gtm.you1.cn/profiles/76561198014511934/posthistory

You should delete all of those posts or you might get community banned.

please accept ( esea schedule)

consistent kills

amazing player

🤍𝙃𝙖𝙫𝙚 𝙖 𝙜𝙧𝙚𝙖𝙩 𝙙𝙖𝙮🤍