> once you ensure that someone is not gaming the system, i.e. someone pretending to be more than one person
For this to work you would need a worldwide government identity check protocol implemented by all participating countries, something like OAuth so you could register only one account connected to that real identity, it could still be anonymous from other users perspective. Problem here is that even if that would make bot problem less significant it would not eliminate it. You would have farms of hacked identities and then in countries with really low income you could buy those identities (digital access) for a few dollars per piece.
For this to work you would need a worldwide government identity check protocol implemented by all participating countries, something like OAuth so you could register only one account connected to that real identity, it could still be anonymous from other users perspective. Problem here is that even if that would make bot problem less significant it would not eliminate it. You would have farms of hacked identities and then in countries with really low income you could buy those identities (digital access) for a few dollars per piece.