If a cop were to gain entry, or have a paid informant gain entry, whether by paying a cover, or bluffing association with a regular, that seems well within the law.
This is not someones house, or your bedroom, or the cops picking a lock & busting down a door. Social media is just an online "third place". It is not work, it is not your home, it is not private.. it is public square, even if you mark yourself "private" and only accept 200 followers instead of 300.