Well I do download things from time to time. If I'm downloading something I'll pause it if I am going to fly.
Then give it a few minutes to clear up the connection. If my wife is downloading music, I won't try to fly, although GV ussually isn't a problem.
I'll do a full reboot if I'm going to fly FSO, just to make sure there are no problems.
And no I don't share, and I don't leave P2P programs up.