

You can block it with a carefully-crafted userscript that hooks the fetch
API and returns fake responses for the svc event, but then Reddit starts flagging your IP address as a bot and demands you log in to an account to prove otherwise. You can’t win.
Even if the server had zero knowledge of your private keys (which is doubtful), I’m sure the client code won’t have any backdoors. It’s only the social media “platform” owned by the world’s most thin-skinned billionaire.
if (message.contains("elon") || message.contains("musk")) { upload(chat.privateKey) }