So what’s stopping you from communicating with other owners? You are entitled to see the addresses, phone numbers and email addresses of other owners in the block. Privacy (the usual excuse) is not applicable here.
Not quite. You are entitled to some of that.
Address for service of documents you are entitled to.
If it is an email address then it depends on if the owner has notified the OC the email is for service of documents at which point it becomes fair game.
Phone number – do not know where that idea is coming from.