What happens if you don’t have any mainstream social media accounts? What happens if you say you don’t have any mainstream social media accounts? What happens if you give them a the handle of a respectable “friend’s” account? How far do they go to actually verify or enforce this?
Hey mate, fellow Aussie here in almost identical situation, minus the “anonymous” Facebook account. I have one from decades ago in my real name that I haven’t used except for 2 Marketplace purchases in the last 15 years. I’ve tried creating new accounts in fake names, on public Wi-Fi with no luck. In one case the account was flagged for review and never approved, and in the other I was suspended until I would upload a selfie (how about no?). Do you have any tips on how you established a ghost account in the first place?
Surprised no one else has chimed in with this yet - but what is your threat model? Are you conducting terrorist activities? Good luck. Are you wanting private messaging between you and your friends - it’s probably fine - definitely better than texting. I will temper this with just keep in mind anything you send to someone could be screenshot, their partner could see it etc. You need to figure out who your potential adversary is before deciding if a communication channel is “safe”. First ask yourself “safe from what?”.