i think it sort of depends on the game. if your 'worlds' are divided up by servers, the server can manage the environment. ie checking to see if people have walked through walls etc. and control game rules
in everquest (at least when i was playing it) each area was a different server, so walking through a tunnel would end you up on another server basicly. However that means that the environment is not constant. there are a few ways of doing the architecture. it gets kinda sticky.
however if you run a game that has limits on how many people can be in specific environments, ie space stations. Then you only allow as many ships to dock as the server can handle. you just state that the 'space station docks are full', and that the user should 'wait till someone leaves'.
Sometimes the game rules can work to yoru advantage.
in everquest (at least when i was playing it) each area was a different server, so walking through a tunnel would end you up on another server basicly. However that means that the environment is not constant. there are a few ways of doing the architecture. it gets kinda sticky.
however if you run a game that has limits on how many people can be in specific environments, ie space stations. Then you only allow as many ships to dock as the server can handle. you just state that the 'space station docks are full', and that the user should 'wait till someone leaves'.
Sometimes the game rules can work to yoru advantage.