Yvil did this once in Hamburg i think, since the majority of the playerbase was from Europe it'd be understandable. Now? All servers are shut down, there are players from Turkey, Pakistan, India, South Africa, Australia, New Zealand, The US you see my point here? This is a multicultural server, Taking a train from Krasnodar to Moscow or a plane from let's say Kazan to Moscow is not the same of taking a plane from Glasgow to Islamabad. If administration tried to hold a player-admin meeting event the price difference would be the main problem, then we have the place of the event, let's say it'll be Istanbul, yeah sure everyone in Australia would love to take 18 hour flight to Turkey just to come see some people, or South Africans were dying to come here just to meet, have an after party and go back. Not mentioning everyone has to take care of their own stuff in the meanwhile.
Bad idea, only could work if all the players had their own national server and the admins from those servers tried to organize it in their own way in their own countries.