I am gonna say this first and foremost, I am not trying to ignite a flame war. I know several others have received inexplicable lag but my story just represents how awful it truly is. I was dominating the war zone with Protection 3 Unbreaking 3 and my Sharp 4 sword when all of a sudden an iron noob hits me. Out of absolute nowhere I get disconnected, I tried to reconnect to defend myself since I knew they could kill me when I was combat logged; but it said Ninjurry was already logged in and when it finally allowed me to log in it was too late and I had already died. I own the best internet package and my computer is really powerful so it wasn't a client-side problem. Anyway, be wary of the server lag, oversensitive DDOS protection and anticheat.
Yeah, it is not a client side issue, when this happens I am able to connect to other servers and also websites. Also btw, "best internet package" is not the same as "best USA internet package", USA has some of the crappiest yet most expensive internet in the world. (Just thought I would take the opportunity to say this)
I hate lag too, it really annoys me sometimes when i'm trying to build on factions. If I place a block or break a block it will just spawn back and i'm mostly always on 4 bars when this happens :/
That is not your internet but the server. Also this is not the same kind of lag that he had. He got a glitch where the server thinks you are online and your player is still there for other players and they can kill you even though you are offline. You could post it in the bugs section of the forums but I don't know whether it is a fixable bug (It might be a bug just in the Minecraft code)