I mean. It is fair, because everyone is affected by it the same way. In one game, you might have important information given away, but in another, someone could give you information about someone else. Plus, they had the intel before they were eliminated anyway. It isn't like they get eliminated from the game and then suddenly are in a better position. An eliminated/resigned player likely won't have much in their sonar range anyway, and if they do, it probably won't be for long.

The real problem that i see though, is when someone does it when they're multiboxing. You could be playing a 6 player game with one person that has 5 "players" (as an extreme example). Still not fair play even with a blind radar on eliminated "players", but it would help eliminate the ability to create a no mans land that only the multiboxing player can see what's on the other side. I assume the developers intended the game to be played by individual people controling 1 "player" each, rather than what multiboxers do. Multiboxing also takes away the ability to make alliances, and dirty deals that make the game so good.
I know you can't stop multiboxing, but at least take away one of the advantages of doing it.

This is like. The least important problem with mutliboxing though. Anyone who is multi boxing likely won't get eliminated because they'll have a really easy time defending themselves, and it makes literally no sense to join a game with multiple accounts, only to resign on some of them. Have you been in games where people have done this? I

To be honest, I'm still only new at the game, but I read a forum post about multiboxing, and it seemed an easy way to cheat if you wanted easy wins. The way the game I'm in is going I was probably just being paranoid though. Either that, or someone isn't very good at multiboxing. I guess if it becomes a problem, the easy solution is to play with friends or trusted players anyway. Still a damn good game though!

If you thought someone was multi boxing because a resigned player had an online indicator, it's more likely that they were just in a different game.

In my oppinion, If you quit the game or are eliminated you should lose your view of the map.

It makes more sense that the radar stays on. A deposed queen (or her subjects if killed) still has contacts in her land and can feed that info to allies.