running other clients with an upstream affects your send speed to the server, that is then relayed to the guy trying to kill you, which is then relayed back to you saying you are dead.
unless you have a good upstream which is around 2Meg on cable and can be as low as 128k on DSL, and even worse on satellite then I would not stream while flying.
you have to think about the data being passed and the bandwidth used.
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