Manners for Social Media:
Think of a person's page as their living room but with the door slightly open.
In their living room, they are free to say whatever they please.
If you hear something of interest coming from their living room, you may ask to join the discussion. If you are invited in, you may assume you are invited to participate in discussion.
However, should you decide to disrupt instead of discuss, to stomp, shout and shit all over the floor of the person's living room, they have every right to rub your face in it and throw you out.
Have a nice day.
