I would like to point out, ideally when creating a multiplayer server, this phrase should be the absolute last resort. Ever. From a financial standpoint (you're losing customers) and from a Dev/Player relationship standpoint (you lose respect/loyalty).

Yes sometimes it's unavoidable. But avoiding it should always be attempted.

 

I suppose this is my opinion on the matter, since I don't have a degree in game design or anything... but there ya go.