I see three issues here: * Are you a real person or a bot / shill * Are others able to know who you are when you post things * Are you able to support others

I see three issues here: * Are you a real person or a bot / shill * Are others able to know who you are when you post things * Are you able to support others' opinions without any personal stake And I think the answer to all of them is that it depends on scale, although I don't see any particular reason to believe (1) isn't always preferred.